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Which two statements about subqueries are true?（）
- A、A single row subquery can retrieve data from only one table.
- B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
- C、A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.
- D、A single row subquery can retrieve data from more than one table.
- E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
- F、A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.
参考答案
更多 “Which two statements about subqueries are true?（）A、A single row subquery can retrieve data from only one table.B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.C、A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.D、A single row subquery can retrieve data from more than one table.E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.F、A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.” 相关考题
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