SQL stored procedures are powerful tools for encapsulating complex database operations. They allow you to bundle SQL statements, logic, and control flow into reusable units. One of the most crucial ...

Only the name of the column referenced seems to have an impact on how the logical query is rewritten. The join condition doesn't impact it at all. For example, if an inequality join condition is used, ...

The EXISTS condition is an operator whose right operand is a subquery. The result of an EXISTS condition is true if the subquery resolves to at least one row. The result of a NOT EXISTS condition is ...

constant is a number or a quoted character string (or other special notation) that indicates a fixed value. Constants are also called literals. query-expression is described in query-expression.