The SQL DELETE statement removes data from a table based on specified conditions, but it's irreversible and requires caution. Consider potential cascade effects, performance impact, locking, and ...

You can modify or drop a check constraint in SQL using the ALTER TABLE statement. To modify a check constraint, you need to drop the existing one and create a new one with the updated condition.

The most recent stand for SQL syntax is SQL:2016 ISO, but little has changed for these basic querying statements in decades. ... This uses AND to include two conditions in the WHERE clause.

Row value is part of the SQL standard -though not supported by every database in all places- and it allows using the following syntax (for example in a ... but does so by building the expressions so ...