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The CURRENT_USER() function in MySQL is used to return the current user name and host name combination for the MySQL session. It is often employed to retrieve information about the user who is currently connected to the MySQL server. The function provides details in the format ‘user_name’@’host_name’. Syntax Here is the syntax for the CURRENT_USER() […]
In MySQL, the CURRENT_ROLE function is a built-in function that returns the current active roles for the current session. A role is a named collection of privileges that can be granted to users or other roles. The current role determines the access privileges that are available to the user for the current session. Syntax The […]
The CONNECTION_ID function in MySQL is used to retrieve the connection ID (thread ID) for the current client session. Each client session that connects to the MySQL server is assigned a unique connection ID, which can be useful for various administrative and diagnostic purposes. Syntax The syntax for the CONNECTION_ID function is quite simple: CONNECTION_ID() […]
In the realm of MySQL database management, the JSON_OBJECTAGG function plays a crucial role in manipulating and aggregating JSON data. It facilitates the creation of JSON objects from key-value pairs extracted from specific columns. This function’s versatility extends to aggregating data based on group-by criteria, enabling the creation of comprehensive JSON representations of aggregated information. […]
The JSON_ARRAYAGG function in MySQL is used to aggregate values into a JSON array. It is particularly useful when you want to combine multiple rows of data into a single JSON array. This function was introduced in MySQL version 5.7.22. Syntax The basic syntax for the JSON_ARRAYAGG function is as follows: JSON_ARRAYAGG(expr) expr: The expression […]
The MEMBER OF function in MySQL is used to determine whether a specified value is an element of a JSON array. It takes two parameters: value and json_array. The value parameter can be any valid JSON value, and the json_array parameter must be a valid JSON array. Syntax Here is the syntax for the MEMBER […]
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