Expressions, Identifiers, and Wildcard Characters

This section describes Transact-SQL expressions, valid identifiers, and wildcard characters.

• Expressions
  An expression is a combination of one or more constants, literals, functions, column identifiers and/or variables, separated by operators, that returns a single value.
• Identifiers
  Identifiers are names for database objects such as databases, tables, views, columns, indexes, triggers, procedures, defaults, rules, and cursors.
• like Pattern Matching
  The SAP ASE server allows you to treat square brackets individually in the like pattern-matching algorithm.
• Pattern Matching with Wildcard Characters
  Wildcard characters represent one or more characters, or a range of characters, in a match_string.