{"id":4485,"date":"2025-01-23T10:44:46","date_gmt":"2025-01-23T18:44:46","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/synthetic-data-generation-capella-datastudio\/"},"modified":"2025-01-23T10:44:46","modified_gmt":"2025-01-23T18:44:46","slug":"synthetic-data-generation-capella-datastudio","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/synthetic-data-generation-capella-datastudio\/","title":{"rendered":"Synthetic Data Generation with Capella DataStudio"},"content":{"rendered":"\n<p><span>If you\u2019re a developer working with Couchbase or Capella, you\u2019ll want to know about <\/span><a href=\"https:\/\/capelladatastudio.com\/\"><b>Capella DataStudio<\/b><\/a><span>. It\u2019s a free, community-supported tool with a slick, single-pane-of-glass UI for managing <\/span><b>Capella Operational<\/b><span>, <\/span><b>Capella Columnar<\/b><span>, and <\/span><b>Couchbase Server Clusters<\/b><span>. Not only does it boost developer productivity, but it also makes your experience a whole lot smoother (and cooler).\u00a0<\/span><\/p>\n\n\n\n<p><span>Now, it comes with a brand new feature: <\/span><b>Synthetic Data Generator.<\/b><\/p>\n\n\n\n<p><b>Capella DataStudio&#8217;s Synthetic Data Generator<\/b><span> is designed to empower developers with a seamless, no-code way to create realistic and meaningful data for their projects. Whether you\u2019re testing applications, training machine learning models, or simulating large-scale systems, this feature provides unparalleled flexibility and power.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span>What is Synthetic Data?<\/span><\/h2>\n\n\n\n<p><span>Synthetic data is not just &#8220;fake&#8221; data; it\u2019s designed to mimic the properties, distributions, and relationships of real-world data. While fake data might generate random values without context, synthetic data aims to:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>Maintain logical relationships between fields (e.g., city and state are consistent)<\/span><\/li>\n\n\n<li><span>Follow realistic distributions, such as generating values that adhere to normal or weighted distributions<\/span><\/li>\n\n\n<li><span>Be statistically relevant for testing, analysis, and simulation<\/span><\/li>\n\n\n<li><span>This makes synthetic data incredibly useful in scenarios where real data is unavailable, sensitive, or insufficient<\/span><\/li>\n\n<\/ul>\n\n\n\n<p>Read on to dig into synthetic data generation or watch this video to see it in action.<\/p>\n\n\n\n<p><iframe loading=\"lazy\" title=\"Capella DataStudio Synthetic Data Generator\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/_21RzBoCA_0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span>Key features of Capella DataStudio&#8217;s Synthetic Data Generator<\/span><\/h2>\n\n\n\n<p><b>Realistic, correlated data<\/b><\/p>\n\n\n\n<p><span>Our generator ensures data relationships are meaningful. For example, addresses include matched city, state, zip code, latitude, and longitude values. Names and demographics are logically consistent.<\/span><\/p>\n\n\n\n<p><b>Built-in typesets, fully configurable<\/b><\/p>\n\n\n\n<p><span>Choose from a wide array of built-in typesets to jumpstart your data generation. Each type can be customized to suit your specific needs, whether it\u2019s names, locations, dates, or numeric fields.<\/span><\/p>\n\n\n\n<p><b>Extendible: bring your own typesets<\/b><\/p>\n\n\n\n<p><span>Got your own datasets or specific requirements? Import custom typesets to extend the generator\u2019s capabilities and create tailored data that fits your unique use case.<\/span><\/p>\n\n\n\n<p><b>Primary Key \/ Foreign Key relationship<\/b><span>s<\/span><\/p>\n\n\n\n<p><span>Model complex datasets with ease by defining relationships between fields. Foreign keys can reference primary key data, enabling realistic relational data structures.<\/span><\/p>\n\n\n\n<p><b>Expression Handling with Powerful Functions<\/b><\/p>\n\n\n\n<p><span>Leverage built-in functions to create complex expressions without writing a single line of code. Combine and manipulate fields dynamically for ultimate control over your data.<\/span><\/p>\n\n\n\n<p><b>No restrictions on data size<\/b><\/p>\n\n\n\n<p><span>Generate data at any scale, from a few rows for small tests to millions of documents for large-scale simulations. There are no limits to what you can create.<\/span><\/p>\n\n\n\n<p><b>Seamless integration with Capella Operational and Couchbase Server<\/b><\/p>\n\n\n\n<p><span>Take your synthetic data further by importing it directly into Capella Operational or Couchbase Server. This ensures a streamlined workflow from generation to deployment.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span>Why choose Capella DataStudio for synthetic data generation?<\/span><\/h3>\n\n\n\n<p><span>With its intuitive UI and robust feature set, Capella DataStudio\u2019s Synthetic Data Generator is the ultimate tool for creating high-quality, meaningful datasets. Whether you\u2019re a developer, data scientist, or tester, this feature will save time, reduce complexity, and enhance your projects with realistic data. Explore its endless possibilities and redefine your data creation experience.<\/span><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span>Synthetic data generation<\/span><\/h2>\n\n\n\n<p><span>Let&#8217;s look at how the Synthetic Data Generator works.\u00a0<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span>Schema builder<\/span><\/h3>\n\n\n\n<p><span>The schema is built Field by Field, one row at a time.\u00a0<\/span><span>Each row has a minimum of two attributes:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>The field name<\/span><\/li>\n\n\n<li><span>The Data Type of the Field &#8211; t<\/span><span>his could come from the <\/span><i><span>core<\/span><\/i><span> or <\/span><i><span>user<\/span><\/i><span> typeset<\/span><\/li>\n\n<\/ul>\n\n\n\n<p><span>Depending on the Data Type, more attributes may be exposed:<\/span><\/p>\n\n\n\n<figure id=\"attachment_16791\" aria-describedby=\"caption-attachment-16791\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image1-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-16791 size-large\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image1-2-1024x573-1.png\" alt=\"\" width=\"900\" height=\"504\"><\/a><figcaption id=\"caption-attachment-16791\" class=\"wp-caption-text\">Example of the orders schema<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Field name<\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>Field names can be any JSON compliant field name<\/span><\/li>\n\n\n<li><span>Nested JSON objects are specified by dotted format<\/span>\n<ul>\n<li aria-level=\"2\"><span>Deeply nested JSON supported<\/span><\/li>\n<\/ul>\n<\/li>\n\n\n<li><span>Field names with a double dash prefix will be treated as a Primary Key<\/span>\n<ul>\n<li aria-level=\"2\"><span>When Generating Datasets, these keys will also be exported and will be saved as <\/span><i><span>localStore\/SyntheticData\/DataSets\/schemaName.pk<\/span><\/i><span> file<\/span><\/li>\n<li aria-level=\"2\"><span>Primary Keys can be specified only in fields in root document<\/span>\n<ul>\n<li aria-level=\"3\"><span>JSON Objects, Nested Fields, and Hidden Fields cannot be Primary Keys<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n<li><span>Field names with a single dash prefix will be treated as a Hidden Field<\/span>\n<ul>\n<li aria-level=\"2\"><span>Hidden fields are used as temporary storage used in field reference<\/span><\/li>\n<li aria-level=\"2\"><span>Hidden fields cannot be Primary Key<\/span><\/li>\n<li aria-level=\"2\"><span>Hidden fields will not appear in JSON document<\/span><\/li>\n<li aria-level=\"2\"><span>JSON Objects cannot be hidden<\/span><\/li>\n<li aria-level=\"2\"><span>Nested fields can be hidden<\/span><\/li>\n<\/ul>\n<\/li>\n\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Data type<\/span><\/h4>\n\n\n\n<p><span>The data type is selected from a dialog box:<\/span><\/p>\n\n\n\n<figure id=\"attachment_16792\" aria-describedby=\"caption-attachment-16792\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image3-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-16792\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image3-2-1024x830-1.png\" alt=\"\" width=\"900\" height=\"729\"><\/a><figcaption id=\"caption-attachment-16792\" class=\"wp-caption-text\">Picture shows both the core typesets and a user supplied typeset (acme.pizzas)<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Core typesets<\/span><\/h4>\n\n\n\n<p><span>Provided by Capella DataStudio:<\/span><\/p>\n\n\n\n<p><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image2-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-16793\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image2-2-1024x278-1.png\" alt=\"\" width=\"900\" height=\"244\"><\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span>User typesets<\/span><\/h4>\n\n\n\n<p><span>Provided by you to extend the functionality of the Data Generator.\u00a0<\/span><span>You need to provide two files:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>A CSV file with data<\/span><\/li>\n\n\n<li><span>A manifest file describing the Typeset<\/span><\/li>\n\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span>User typeset process<\/span><\/h4>\n\n\n\n<p><span>When a document is generated with user typesets, the following happens:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>One random row is read from the file<\/span><\/li>\n\n\n<li><span>The row is cached in a row-cache<\/span><\/li>\n\n\n<li><span>The fields are then read from this row-cache<\/span>\n<ul>\n<li aria-level=\"2\"><span>Once any field is read, that field is nulled in the row-cache<\/span><\/li>\n<li aria-level=\"2\"><span>If the field is null, the entire row-cache is invalidated and a new random row is read<\/span><\/li>\n<li aria-level=\"2\"><span>The fields are read from the row cache and for a given document, the data is correlated<\/span><\/li>\n<li aria-level=\"2\"><span>Each document starts with a new row-cache<\/span><\/li>\n<\/ul>\n<\/li>\n\n<\/ul>\n\n\n\n<figure id=\"attachment_16794\" aria-describedby=\"caption-attachment-16794\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image5-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-16794\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image5-1-1024x319-1.png\" alt=\"\" width=\"900\" height=\"280\"><\/a><figcaption id=\"caption-attachment-16794\" class=\"wp-caption-text\">Example of pizzas typeset<\/figcaption><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image7-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-16795\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image7-1-1024x159-1.png\" alt=\"\" width=\"900\" height=\"140\"><\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span>Core function<\/span><\/h3>\n\n\n\n<p><span>There are three special data type:<\/span><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><span>expression<\/span><\/li>\n\n\n<li><span>foreignKey<\/span><\/li>\n\n\n<li><span>jsonArray<\/span><\/li>\n\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span>1. core.function.expression<\/span><\/h3>\n\n\n\n<p><span>Expressions are a powerful way of customizing the schema:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>Expressions are just strings<\/span><\/li>\n\n\n<li><span>They can have embedded <\/span><b>references<\/b><span> (enclosed in <em>%%<\/em>) and <\/span><b>functions<\/b><\/li>\n\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Document and expression architecture<\/span><\/h4>\n\n\n\n<p><span>Let&#8217;s see how the document is built:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>The document is built, top down, row by row.<\/span>\n<ul>\n<li aria-level=\"2\"><span>We always have a partial document at every row stage.<\/span><\/li>\n<\/ul>\n<\/li>\n\n\n<li><span>First, the expression is a string<\/span><\/li>\n\n\n<li><span>It goes to an <\/span><b>Expression Evaluator<\/b>\n<ul>\n<li aria-level=\"2\"><span>The partial document, with its fields and values is supplied to the evaluator.<\/span>\n<ul>\n<li aria-level=\"3\"><span>This means, the previous fields and their evaluated values are now available.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n<li><span>The string is then examined for <\/span><b>references<\/b>\n<ul>\n<li aria-level=\"2\"><span>References are field names, previously used, and their values, from the partial document.<\/span><\/li>\n<li aria-level=\"2\"><span>References are replaced by the values<\/span><\/li>\n<li aria-level=\"2\"><span>This means that references can also be inside of <\/span><b>functions<\/b><\/li>\n<\/ul>\n<\/li>\n\n\n<li><span>The string is then examined for <\/span><b>functions<\/b>\n<ul>\n<li aria-level=\"2\"><span>The functions are then executed and their values are replaced in the partial document.<\/span><\/li>\n<\/ul>\n<\/li>\n\n\n<li><span>The Evaluator finally returns back the output.<\/span><\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span>2. core.function.foreignKey<\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Foreign keys and data correlation<\/span><\/h4>\n\n\n\n<p><span>When working with relational data, maintaining referential integrity through foreign keys is crucial. Here&#8217;s how our synthetic data generator handles foreign key relationships:<\/span><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span>How foreign keys work<\/span><\/h4>\n\n\n\n<p><span>First, you&#8217;ll need to generate your primary dataset. Let&#8217;s say you have a schema for <em>Departments<\/em>\u00a0that generates a CSV file containing department IDs and names. These department IDs serve as primary keys in the Departments dataset.<\/span><\/p>\n\n\n\n<p><span>When you create another schema, say for <em>Employees<\/em>, you can specify fields that reference these existing primary keys. The schema builder provides two drop-down menus:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>A dropdown to select the source dataset (e.g., &#8220;Departments&#8221;)<\/span><\/li>\n\n\n<li><span>A dropdown to select which primary key field to reference (e.g., &#8220;id&#8221;)<\/span><\/li>\n\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Data generation process<\/span><\/h4>\n\n\n\n<p><span>When generating data with foreign key references, the system:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>Randomly selects a row from the source dataset<\/span><\/li>\n\n\n<li><span>Reads the primary key value(s) from that row<\/span><\/li>\n\n\n<li><span>Uses these values in the new dataset being generated<\/span><\/li>\n\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Maintaining data correlation<\/span><\/h4>\n\n\n\n<p><span>An important feature is how we handle multiple foreign key references. If your schema references multiple columns from the same source dataset, the values are pulled from the same row to maintain logical correlation.<\/span><\/p>\n\n\n\n<p><span>For example, if your Employee schema references both department_id and department_location from the Departments dataset, both values will come from the same department record. This ensures that the synthetic data maintains realistic relationships between related fields.<\/span><\/p>\n\n\n\n<p><span>This approach helps create more realistic synthetic datasets by preserving the referential integrity and logical relationships present in real-world data.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span>3. core.function.jsonArray<\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><span>JSON array configuration<\/span><\/h4>\n\n\n\n<p><span>When configuring a JSON array field, you can specify:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>Minimum number of objects in the array<\/span><\/li>\n\n\n<li><span>Maximum number of objects in the array<\/span><\/li>\n\n<\/ul>\n\n\n\n<p><span>The generator will then create arrays with a random number of objects within your specified range.<\/span><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span>Structure and limitations<\/span><\/h4>\n\n\n\n<p><span>The JSON arrays follow these rules:<\/span><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><span>Each array contains simple, flat JSON objects<\/span><\/li>\n\n\n<li><span>Nesting of arrays is not supported (no arrays within arrays)<\/span><\/li>\n\n\n<li><span>Each object in the array follows the same structure<\/span><\/li>\n\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span>Data generation<\/span><\/h2>\n\n\n\n<p><span>Once the schema has been built to your satisfaction, it&#8217;s time to generate data.<\/span><\/p>\n\n\n\n<figure id=\"attachment_16796\" aria-describedby=\"caption-attachment-16796\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image8-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-16796\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image8-1-1024x477-1.png\" alt=\"\" width=\"900\" height=\"419\"><\/a><figcaption id=\"caption-attachment-16796\" class=\"wp-caption-text\">Picture shows generating synthetic dataset<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>Dataset is generated and written to <\/span><i><span>LocalStore\/SyntheticData\/DataSets\/<\/span><\/i><\/li>\n\n\n<li><span>The dataset filename is <\/span><i><span>schemaName.json<\/span><\/i>\n<ul>\n<li aria-level=\"2\"><span>This is a <\/span><i><span>JSON Lines<\/span><\/i><span> file<\/span><\/li>\n<li aria-level=\"2\"><span>If the document has fields marked as Primary Key (prefixed with double-dash), then, a <\/span><i><span>schemaName.pk<\/span><\/i><span> is also produced<\/span>\n<ul>\n<li aria-level=\"3\"><span>The .pk file is a CSV file<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n<li><span>If any field has the <\/span><i><span>seq()<\/span><\/i><span> function, the sequences are incremented by 1<\/span><\/li>\n\n\n<li><span>There is no limit to the number of documents<\/span><\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span>Example datasets<\/span><\/h3>\n\n\n\n<p><i><span>customer.json<\/span><\/i><\/p>\n\n\n<p>[crayon nums=&#8221;false&#8221; wrap=&#8221;true&#8221; lang=&#8221;js&#8221; decode=&#8221;true&#8221;][<\/p>\n<p>{&#8220;id&#8221;:&#8221;customer_1&#8243;,&#8221;name&#8221;:&#8221;Lula Kuhic&#8221;,&#8221;gender&#8221;:&#8221;Demi-man&#8221;,&#8221;age&#8221;:65,&#8221;email&#8221;:&#8221;Electa29@yahoo.com&#8221;,&#8221;address&#8221;:{&#8220;street&#8221;:&#8221;46938 VonRueden Village Suite 474&#8243;,&#8221;city&#8221;:&#8221;Los Angeles&#8221;,&#8221;state&#8221;:&#8221;California&#8221;,&#8221;zip&#8221;:&#8221;90001&#8243;,&#8221;geo&#8221;:{&#8220;latitude&#8221;:33.7423,&#8221;longitude&#8221;:-117.4412}},&#8221;phones&#8221;:{&#8220;home&#8221;:&#8221;(310) 788-5382&#8243;,&#8221;cell&#8221;:&#8221;(310) 923-5319&#8243;}},<\/p>\n<p>{&#8220;id&#8221;:&#8221;customer_2&#8243;,&#8221;name&#8221;:&#8221;Chelsea Wilderman&#8221;,&#8221;gender&#8221;:&#8221;Transsexual female&#8221;,&#8221;age&#8221;:58,&#8221;email&#8221;:&#8221;Augusta_Mann27@yahoo.com&#8221;,&#8221;address&#8221;:{&#8220;street&#8221;:&#8221;8409 Jesse Mill Apt. 289&#8243;,&#8221;city&#8221;:&#8221;Sacramento&#8221;,&#8221;state&#8221;:&#8221;California&#8221;,&#8221;zip&#8221;:&#8221;95814&#8243;,&#8221;geo&#8221;:{&#8220;latitude&#8221;:38.8607,&#8221;longitude&#8221;:-121.0356}},&#8221;phones&#8221;:{&#8220;home&#8221;:&#8221;(916) 879-6009&#8243;,&#8221;cell&#8221;:&#8221;(916) 503-2269&#8243;}},<\/p>\n<p>\u2026<\/p>\n<p>][\/crayon]<\/p>\n\n\n\n<p><i><span>customer.pk<\/span><\/i><\/p>\n\n\n<p>[crayon nums=&#8221;false&#8221; lang=&#8221;js&#8221; decode=&#8221;true&#8221;]id,name<br \/>\n&#8220;customer_1&#8243;,&#8221;Lula Kuhic&#8221;<br \/>\n&#8220;customer_2&#8243;,&#8221;Chelsea Wilderman&#8221;<br \/>\n\u2026<br \/>\n[\/crayon]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span>Dataset preview<\/span><\/h3>\n\n\n\n<p><span>You can preview the generated datasets. The preview panel supports previewing the data either in JSON format or table format.<\/span><\/p>\n\n\n\n<figure id=\"attachment_16797\" aria-describedby=\"caption-attachment-16797\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image6-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-16797 size-large\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image6-1-1024x571-1.png\" alt=\"\" width=\"900\" height=\"502\"><\/a><figcaption id=\"caption-attachment-16797\" class=\"wp-caption-text\">Picture shows the preview panel and the table preview<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span>Import<\/span><\/h3>\n\n\n\n<p><span>You can import the generated dataset into your Couchbase collection:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span>Import uses the cbimport utility and offers all its import options<\/span><\/li>\n\n\n<li><span>There is no file limit to import<\/span><\/li>\n\n<\/ul>\n\n\n\n<figure id=\"attachment_16798\" aria-describedby=\"caption-attachment-16798\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2025\/01\/image4-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-16798\" src=\"https:\/\/www.couchbase.com\/wp-content\/uploads\/sites\/5\/2026\/05\/image4-1-1024x859-1.png\" alt=\"\" width=\"900\" height=\"755\"><\/a><figcaption id=\"caption-attachment-16798\" class=\"wp-caption-text\">Picture shows the import dialog box and options<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Ready to boost your productivity?<\/h2>\n\n\n\n<p><span>Capella DataStudio is the tool developers have been waiting for. Whether you\u2019re managing Couchbase Server, Capella Operational, or Capella Columnar clusters, this app makes your job easier, faster, and yes\u2014cooler.<\/span><\/p>\n\n\n\n<p><b>Try <a href=\"https:\/\/capelladatastudio.com\/\">Capella DataStudio for free<\/a><\/b> <span>and check out our <\/span><b>tutorial videos<\/b><span>:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=IqMLtgl84-E\"><span>Capella Operational<\/span><\/a><\/li>\n\n\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=LSh26boiHdQ\"><span>Capella Columnar<\/span><\/a><\/li>\n\n\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=_21RzBoCA_0\"><span>Synthetic Data Generator<\/span><\/a><\/li>\n\n<\/ul>\n\n\n\n<p><span>With Capella DataStudio, managing data has never been this fun or productive!<\/span><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span>Appendix &#8211; f<\/span><span>unctions supported in expressions<\/span><\/h2>\n\n\n\n<p><i><span>Table shows list of available functions to use in expressions:<\/span><\/i><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<tbody>\n<tr>\n<td><b>Type<\/b><\/td>\n<td><b>Example<\/b><\/td>\n<td><b>Output<\/b><\/td>\n<\/tr>\n<tr>\n<td>int(min,max)<\/td>\n<td>int(1,10)<\/td>\n<td>6<\/td>\n<\/tr>\n<tr>\n<td>float(min,max)<\/td>\n<td>float(1.234,10.587)<\/td>\n<td>5.824<\/td>\n<\/tr>\n<tr>\n<td>float(min,max,dec)<\/td>\n<td>float(1,10,2)<\/td>\n<td>5.82<\/td>\n<\/tr>\n<tr>\n<td>normal(mean,std,dec)<\/td>\n<td>normal(50,10,3)<\/td>\n<td>56.48<\/td>\n<\/tr>\n<tr>\n<td>bool()<\/td>\n<td>bool()<\/td>\n<td>FALSE<\/td>\n<\/tr>\n<tr>\n<td>bool(bias)<\/td>\n<td>bool(0.8)<\/td>\n<td>TRUE<\/td>\n<\/tr>\n<tr>\n<td>date(from,to)<\/td>\n<td>date(01\/01\/2024,12\/31\/2024)<\/td>\n<td>&#8220;02\/02\/2024&#8221;<\/td>\n<\/tr>\n<tr>\n<td>time(from,to)<\/td>\n<td>time(08:00 am, 5:00 pm)<\/td>\n<td>&#8220;08:47 AM&#8221;<\/td>\n<\/tr>\n<tr>\n<td>arrayItem(array)<\/td>\n<td>arrayItem([&#8220;cat&#8221;,&#8221;mouse&#8221;,&#8221;dog&#8221;])<\/td>\n<td>&#8220;cat&#8221;<\/td>\n<\/tr>\n<tr>\n<td>arrayItem(array)<\/td>\n<td>arrayItem([&#8220;cat:2&#8243;,&#8221;mouse:1&#8243;,&#8221;dog:7&#8221;])<\/td>\n<td>&#8220;dog&#8221;<\/td>\n<\/tr>\n<tr>\n<td>arrayItems(array,length)<\/td>\n<td>arrayItems([&#8220;cat&#8221;,&#8221;mouse&#8221;,&#8221;dog&#8221;],2)<\/td>\n<td>[&#8220;cat&#8221;,&#8221;mouse&#8221;]<\/td>\n<\/tr>\n<tr>\n<td>arrayItems(array,length)<\/td>\n<td>arrayItems([&#8220;cat:2&#8243;,&#8221;mouse:1&#8243;,&#8221;dog:7&#8221;])<\/td>\n<td>[&#8220;cat&#8221;,&#8221;dog&#8221;]<\/td>\n<\/tr>\n<tr>\n<td>arrayKV(array,field)<\/td>\n<td>arrayKV([&#8220;cat:2&#8243;,&#8221;mouse:1&#8243;,&#8221;dog:7&#8243;],&#8221;cat&#8221;)<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>gps(latitude,longitude)<\/td>\n<td>gps(37.3382,-121.8863)<\/td>\n<td>gpsObject<\/td>\n<\/tr>\n<tr>\n<td>gpsNearby(gps,radius)<\/td>\n<td>gpsNearby(%gps%,20)<\/td>\n<td>gpsObject<\/td>\n<\/tr>\n<tr>\n<td>seq(startNumber)<\/td>\n<td>seq(1000)<\/td>\n<td>1030<\/td>\n<\/tr>\n<tr>\n<td>uuid()<\/td>\n<td>uuid()<\/td>\n<td>&#8220;e46b493a-&#8230;&#8221;<\/td>\n<\/tr>\n<tr>\n<td>add(num1,num2)<\/td>\n<td>add(1.23,3.45)<\/td>\n<td>4.68<\/td>\n<\/tr>\n<tr>\n<td>subtract(num1,num2)<\/td>\n<td>subtract(1.23,3.45)<\/td>\n<td>-2.22<\/td>\n<\/tr>\n<tr>\n<td>multiply(num1,num2)<\/td>\n<td>multiply(1.23,3.45)<\/td>\n<td>4.24<\/td>\n<\/tr>\n<tr>\n<td>percent(num,den)<\/td>\n<td>percent(1.23,3.45)<\/td>\n<td>&#8220;35.65%&#8221;<\/td>\n<\/tr>\n<tr>\n<td>accumulate(num,name)<\/td>\n<td>accumulate(%orders.subTotal%,sale)<\/td>\n<td>1304.84<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p><br><br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019re a developer working with Couchbase or Capella, you\u2019ll want to know about Capella DataStudio. It\u2019s a free, community-supported tool with a slick, single-pane-of-glass UI for managing Capella Operational, Capella Columnar, and Couchbase Server Clusters. Not only does it boost developer productivity, but it also makes your experience a whole lot smoother (and cooler).\u00a0 [&hellip;]<\/p>\n","protected":false},"author":57747,"featured_media":4484,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[136,301,54,189],"tags":[946,850,947],"ppma_author":[406],"class_list":["post-4485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-best-practices-and-tutorials","category-cloud","category-couchbase-server","category-data-modeling","tag-capella-datastudio","tag-orm","tag-synthetic-data"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Synthetic Data Generation with Capella DataStudio - The Couchbase Blog<\/title>\n<meta name=\"description\" content=\"Generate realistic data effortlessly with Capella DataStudio&#039;s Synthetic Data Generator. 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