Difference between revisions of "Update Queries"
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| − | + | For updating values already entered into a database. Can edit multiple rows at once. Not using the WHERE clause will cause every entry to be edited. | |
Revision as of 14:47, 21 December 2016
For updating values already entered into a database. Can edit multiple rows at once. Not using the WHERE clause will cause every entry to be edited.
Editing 'table'
- "UPDATE table SET column1=value1 WHERE column2=value2;" - Changes values in column1 to value1, where column2 equals value2.
- "UPDATE table SET column1=value1;" - Sets all values in the table, in column1, to value1 (regardless of their current value).
- "UPDATE table SET column1=value1, column2=value2;" - Changes column1 to value1 and column2 to value2.
