UPDATE

UPDATE 语句用于修改指定表中的数据。

语法图

UpdateStmt:

UpdateStmt

TableRef:

TableRef

TableRefs:

TableRefs

AssignmentList:

AssignmentList

WhereClauseOptional:

WhereClauseOptional

示例

  1. CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, c1 INT NOT NULL);
  1. Query OK, 0 rows affected (0.11 sec)
  1. INSERT INTO t1 (c1) VALUES (1), (2), (3);
  1. Query OK, 3 rows affected (0.02 sec)
  2. Records: 3 Duplicates: 0 Warnings: 0
  1. SELECT * FROM t1;
  1. +----+----+
  2. | id | c1 |
  3. +----+----+
  4. | 1 | 1 |
  5. | 2 | 2 |
  6. | 3 | 3 |
  7. +----+----+
  8. 3 rows in set (0.00 sec)
  1. UPDATE t1 SET c1=5 WHERE c1=3;
  1. Query OK, 1 row affected (0.01 sec)
  2. Rows matched: 1 Changed: 1 Warnings: 0
  1. SELECT * FROM t1;
  1. +----+----+
  2. | id | c1 |
  3. +----+----+
  4. | 1 | 1 |
  5. | 2 | 2 |
  6. | 3 | 5 |
  7. +----+----+
  8. 3 rows in set (0.00 sec)

MySQL 兼容性

UPDATE 语句与 MySQL 完全兼容。如有任何兼容性差异,请在 GitHub 上提交 issue

另请参阅