Archive for the ‘Uncategorized’ Category

• Exists or not

  Thursday, April 24th, 2008

  Many comparison conditions are applicable to subqueries. A subquery syntax diagram is shown in Figure 12.1. The type of results allowed from a subquery depends on the comparison operator that you use. In Figure 12.1, the highlighted operators require single-row subqueries. This includes the equality and inequality operators (=, <=, >=, >, <, and !=), […]