试题详情
- 多项选择题Which two statements about subqueries are true? （）
A、A subquery should retrieve only one row.
B、A subquery can retrieve zero or more rows.
C、A subquery can be used only in SQL query statements.
D、Subqueries CANNOT be nested by more than two levels.
E、A subquery CANNOT be used in an SQL query statement that uses group functions.
F、When a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.
关注下方微信公众号，在线模考后查看
热门试题
- FromSQL*Plus,youissu
- In which case would
- The STUDENT_GRADES
- Which data dictionar
- You need to perform
- Examine the descrip
- What is necessary fo
- Which are /SQL*Plus
- Evaluate these two
- What is true about s
- Evaluate this SQL s
- Which two statements
- Which two statements
- You need to give the
- The EMPLOYEES table
- Which SELECT stateme
- Which two statements
- A data manipulation
- Which two statements
- Evaluate these two S