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. | 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. | ||
| − | < | + | <nowiki> |
Editing 'table': | Editing 'table': | ||
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:"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;" - 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. | :"UPDATE table SET column1=value1, column2=value2;" - Changes column1 to value1 and column2 to value2. | ||
| + | </nowiki> | ||
Revision as of 15:46, 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.
