Command UPDATE - SQL Foundation
Updates one or more records in a table. END
UPDATE <cTableName> SET <cFieldName> := <Expression>|<SubSelectExpression> [, ...] | FROM (aData|oData) WHERE <lExpression> [VIA (<coSession>)]
UPDATE changes the values of the specified columns in all rows that meet the filter condition. Only the columns to be modified must be listed in the SET clause. Columns not explicitly modified retain their previous values.
There are two ways to modify a table using information contained in other tables in the database: by using sub-selects, or by specifying additional tables in the FROM clause. Which technique is more appropriate depends on the specific circumstances.
If you see anything in the documentation that is not correct, does not match your experience with the particular feature or requires further clarification, please use this form to report a documentation issue.