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  2. Definition and Usage. The COALESCE () function returns the first non-null value in a list. Syntax. COALESCE (val1, val2, ...., val_n) Parameter Values. Technical Details. More Examples. Example. Return the first non-null value in a list: SELECT COALESCE (NULL, 1, 2, 'W3Schools.com'); Try it Yourself » Previous MySQL Functions Next .

  3. Introduction to MySQL COALESCE function. The COALESCE function takes a number of arguments and returns the first non-NULL argument. In case all arguments are NULL, the COALESCE function returns NULL. The following illustrates the COALESCE function syntax: COALESCE(value1,value2,...); Code language: SQL (Structured Query Language) (sql) For example:

  4. May 24, 2022 · We can use the COALESCE () function to replace the NULL value with a simple text: SELECT first_name, last_name, COALESCE (marital_status, 'Unknown') FROM persons. The COALESCE () function is used to return the value 'Unknown' only when marital_status is NULL.

    • Coalesce Function in MySQL
    • Syntax
    • MySQL Coalesce() Function Examples

    The COALESCE function in MySQL is used to get the first non-null value from a list of expressions. If all the values in the list are evaluated to NULL, then the COALESCE() function returns NULL. The COALESCE() function accepts one parameter, which is the list, which can contain various values.

    The MySQL COALESCE function syntax is: Parameters: value_1:It is used to specify the first value in the list.

    Let’s look at some examples of the COALESCE() function in MySQL and understand how to use COALESCE function.

  5. Apr 25, 2022 · In MySQL, the COALESCE() operator returns the first non-NULL value in the list, or NULL if there are no non-NULL values. Syntax. The syntax goes like this: COALESCE(value,...) Example. Here’s a simple example to demonstrate: SELECT COALESCE(null, 'Fish', 'Rabbit'); Result: Fish

  6. Nov 6, 2021 · The MySQL COALESCE() function returns the first non-null value from a list of expressions that you passed as parameters to the function. The list of expressions are separated by a comma: SELECT COALESCE(`expression`, `expression`, `expression`);

  7. Oct 12, 2022 · What is the COALESCE() function? Coalesce returns the first non-null value in a list. If all the values in the list are NULL, then the function returns null.

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