Updating fields mysql
Second, the SET clause specifies which column that you want to modify and the new values.
To update multiple columns, you use a list comma-separated assignments.
i know this is a very common problem and has been posted earlier also... the code is correct and is infact the same for all 3 statements (with the "field_name" beng different of course..) please help as this is really bugging... hi silviuks i tried the method u suggested, but with that, only the first of the 3 columns gets updated.
The following example will update the tutorial_title field for a record having the tutorial_id as 3.
If you update a column that has been declared , an error occurs if strict SQL mode is enabled; otherwise, the column is set to the implicit default value for the column data type and the warning count is incremented.
The implicit default value is tables for which there are foreign key constraints, the My SQL optimizer might process tables in an order that differs from that of their parent/child relationship. Instead, update a single table and rely on the provides to cause the other tables to be modified accordingly. COLUMN2 IS NULLAn outerjoin is performed based on the equijoin condition.
I’ve been searching for an efficient way to set created and modified date fields in My SQL.
Of course, this can be done in the application you’re writing, however, I wanted to find a way to automatically do this on the database layer.
You supply the value in each column’s assignment in the form of a literal value, an expression, or a subquery.