query-expression is described in query-expression . USER is a literal that references the userid of the person who submitted the program. The userid that is returned is operating environment-dependent ...

The sql-expressions must be of compatible data types. They must be either all numeric or all character types. Because a BETWEEN condition evaluates the boundary values as a range, it is not necessary ...

SQL-compliant conditional expressions are available in EDB Postgres Advanced Server.

A conditional gene expression system in Caenorhabditis elegans is reported. It should permit the generation of temperature-sensitive alleles for most genes.