How to check null values in mysql?
1 answer
by
samara ,
a year ago
@larissa
You can check for null values in MySQL using the IS NULL operator or the IS NOT NULL operator.
To check for null values, you can use the following query:
SELECT * FROM table_name WHERE column_name IS NULL;
This query will return all rows where the specified column is null.
If you want to check for non-null values, you can use the IS NOT NULL operator:
SELECT * FROM table_name WHERE column_name IS NOT NULL;
This query will return all rows where the specified column is not null.
Related Threads:
How to avoid caching null values in redis cache?
How to get "not null column name" in mysql database?
How to properly assign null value from bash script to mysql?
How to check if all values of column are same in oracle?
How to get unique values from multiple-column values in mysql?
How to use with and values in mysql?