UPDATE Statement | SQL Statements | VantageCloud Lake - UPDATE

Modifies column values in existing rows of a table.

The UPDATE statement can take the following forms:

Basic - updates one or more rows from a table.
The Basic form can be specified with or without a FROM clause.
Basic for Joined Tables
The Join Condition form updates rows from a table when the WHERE condition directly references columns in tables other than the one from which rows are to be updated; that is, if the WHERE condition includes a subquery or references a derived table.
Positioned - see UPDATE (Positioned Form).
Upsert - see UPDATE (Upsert Form).

ANSI Compliance

UPDATE is ANSI SQL:2011-compliant.

The following privilege rules apply to the UPDATE statement:

You must have the UPDATE privilege on the table or columns to be updated.
When running an UPDATE that also requires READ access to an object, you must have the SELECT privilege on the data being accessed.

For example, in the following request, READ access is required by the WHERE condition.

UPDATE table_1
SET column_1 = 1
WHERE column_1 < 0;

Similarly, the following request requires READ access because you must read column_1 values from table_1 to compute the new values for column_1.

UPDATE table_1
SET field_1 = column_1 + 1;

The following request does not require SELECT privileges:

UPDATE table_1
SET column_3 = 0 ALL;