Q114 You want to write a query that prompts for two column names and the WHERE condition each time it is executed in a session but only prompts for the table name the first time it is executed. The variables used in your query are never undefined in your session. Which query can be used?
- (A). SELECT &&col1, &&col2 FROM &table WHERE &&condition = &&cond;
- (B). SELECT &col1, &col2 FROM &&table WHERE &condition;
- (C). SELECT &col1, &col2 FROM “&table” WHERE &condition;
- (D). SELECT ‘&&col1’, ‘&&col2’ FROM &table WHERE ‘&&condition’ = ‘&cond’;
- (E). SELECT &&col1, &&col2 FROM &table WHERE &&condition;
Xem thêm:
- Q108. You have configured RMAN SBT channels to write backups to media Which three are true?
- HDD là gì?
- Alter table bảng lớn mà không bị treo DB như thế nào?
- Hướng dẫn tối ưu tốc độ tải trang cho WordPress
- Chính Sách Pháp Lý Liên Quan Đến Bitcoin Tại Các Quốc Gia: Sự Đa Dạng Trong Cách Tiếp Cận