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I have the following Mysql 'test' table:
id -- number
1 -- 2
2 -- 33
3 -- 32
4 -- 162
5 -- 42
6 -- 142
7 -- 113
8 -- 12
What would be the query to turn all the values in field 'number' to 0?
I'm trying a kind of reset.
Thanks a ton!
379
UPDATE [table] SET [column]=0 WHERE [column] IS NULL; Null Values can be replaced in SQL by using UPDATE, SET, and WHERE to search a column in a table for nulls and replace them. In the example above it replaces them with 0.
MySQL UPDATE command can be used to update multiple columns by specifying a comma separated list of column_name = new_value. Where column_name is the name of the column to be updated and new_value is the new value with which the column will be updated.
MySQL CONSTRAINT is used to define rules to allow or restrict what values can be stored in columns. The purpose of inducing constraints is to enforce the integrity of a database. MySQL CONSTRAINTS are used to limit the type of data that can be inserted into a table.
Here:
UPDATE test SET number = 0;
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