TABLE
当不需要聚合或复杂的过滤操作时,可以用 TABLE
语句代替 SELECT * FROM
。
语法图
- TableStmt
TableStmt ::=
"TABLE" Table ( "ORDER BY" Column )? ( "LIMIT" NUM )?
示例
CREATE TABLE t1(id INT PRIMARY KEY);
Query OK, 0 rows affected (0.31 sec)
INSERT INTO t1 VALUES (1),(2),(3);
Query OK, 3 rows affected (0.06 sec)
Records: 3 Duplicates: 0 Warnings: 0
TABLE t1;
+----+
| id |
+----+
| 1 |
| 2 |
| 3 |
+----+
3 rows in set (0.01 sec)
TABLE t1 ORDER BY id DESC;
+----+
| id |
+----+
| 3 |
| 2 |
| 1 |
+----+
3 rows in set (0.01 sec)
TABLE t1 LIMIT 1;
+----+
| id |
+----+
| 1 |
+----+
1 row in set (0.01 sec)
MySQL 兼容性
TABLE
语句是从 MySQL 8.0.19 开始引入的。