In SQL Server, we can use the JSON_ARRAY() function to construct JSON array text from zero or more expressions.
The resulting array contains the values we provide as arguments. Providing zero expressions results in an empty array.
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An Introduction to the JSON_OBJECT() Function in SQL Server
In SQL Server, we can use the JSON_OBJECT() function to construct JSON object text from zero or more expressions.
The resulting object contains the key/value pairs that we provide as arguments. Providing zero expressions results in an empty object.
2 Functions that Validate JSON Documents against their Schemas in MySQL
MySQL 8.0.17 introduced a couple of functions that allow us to validate JSON documents against their schemas. These are listed below, with examples.
4 Functions that Return Information about JSON Values in MySQL
MySQL provides us with a wide range of functions for working with JSON documents. Below are four MySQL functions that we can use to get information about JSON values.
3 JSON Utility Functions in MySQL
MySQL provides us with a few utility functions that act on JSON values, or strings that can be parsed as JSON values.
Below are three JSON utility functions that we can use for such tasks.
How to Create a CHECK Constraint Against a JSON Column in MySQL
When we create or modify a table in MySQL, we have the option of applying a CHECK constraint against one or more columns. This allows us to check the data before it enters the database. Data can only enter the database if it doesn’t violate the rules in our CHECK constraint.
If the column is a JSON column, we have the option of creating a CHECK constraint that checks that the JSON document doesn’t violate its JSON schema. To do this, we can include the schema in the CHECK constraint.
10 Functions and Operators that Search JSON Documents in MySQL
MySQL provides us with a bunch of functions and operators that allow us to search JSON documents for various things, such as specific values, paths, keys, etc.
Here are seven functions and three operators that search JSON documents in MySQL.
10 Functions that Modify JSON Values in MySQL
MySQL provides us with a bunch of functions that can modify JSON values. Here are ten functions that we can use to modify JSON values in MySQL.
6 Ways to Extract JSON Data in MySQL
In MySQL, we have several options when it comes to extracting data from JSON documents. Below are six methods we can use to do this.
7 Functions that Create JSON Values in MySQL
MySQL includes some inbuilt functions that can be used to create JSON values, such as JSON arrays, JSON objects, or a quoted string literal.
Here are seven functions that allow us to create JSON values in MySQL.