然后在用navicat运行sql文件时,报出[Err] 1022 - Can't write; duplicate key in table '#sql-1500_26'的错误。 1022错误代码意味着:关键字重复,更改记录失败。 仔细一看表之间的各种,果然有两个外键命名一致,改了之后重新运行就通过了。
Lookup Error - MySQL Database Error: Can't write; duplicate key in table '#sql-950b_476' 2) I'm creating the same table, without AUTO_INCREMENT ALTER TABLE MYTABLE engine=archive ; Lookup Error - MySQL Database Error: Got error -1 from storage engine ...
a)、更新。 语法:insert into 表名字[字段列表(一定要包含主键)] values (字段值列表) on duplicate key update 字段 = 新值; 例子:将【student】表中的编号为1的姓名修改成李四。 insert into student(id,name,age) values(1,'李四',22) on duplicate key update name = '李四'; -- 这个地方值更改了...
# Bug#32552332 - CAN'T WRITE; DUPLICATE KEY IN TABLE '/TMP/#SQL...' # CREATE TABLE tr (c1 INT); INSERT INTO tr VALUES (1); CREATE FUNCTION seq_1_to_2() RETURNS INT BEGIN DECLARE limit_value, return_value INT; SET limit_value = 2; SELECT c1 INTO return_value FROM tr; IF ...
Generally, it’s best practice to put unique constraints on a table to prevent duplicate rows. However, you may find yourself working with a database where duplicate rows have been created through human error, a bug in your application, or uncleaned data from external sources. This tutorial ...
---+ | t1 | CREATE TABLE `t1` ( | | | `id` int(11) NOT NULL AUTO_INCREMENT, | | | PRIMARY KEY (`id`) | | ) ENGINE=InnoDB DEFAULT CHARSET=utf8 | +---+---+ 表里一共三条数据: mysql> select * from t1; +---+ | id | +---+ | 2 | | 4 | | 6 | +---+ 3...
SELECT DISTINCT * INTO duplicate_table FROM original_table GROUP BY key_value HAVING COUNT(key_value) > 1 DELETE original_table WHERE key_value IN (SELECT key_value FROM duplicate_table) INSERT original_table SELECT * FROM duplicate_table DROP TABLE duplicate_table 此...
总体来说,MySQL 中的锁可以分成两个粒度:表锁和行锁,表锁有:表级读锁,表级写锁,读意向锁,写意向锁,自增锁;行锁有:读记录锁,写记录锁,间隙锁,Next-key 锁,插入意向锁。不出意外,绝大多数的死锁问题都是由这些锁之间的冲突导致的。 我们知道,不同的隔离级别加锁也是不一样的,譬如 RR 隔离级别下有...
Violation of PRIMARY KEY constraint 'PK_Users'. Cannot insert duplicate key in object 'dbo.Users'. 1. 5. 忽略插入 若希望在插入时忽略已存在的记录,可以使用MERGE语句或INSERT...ON DUPLICATE KEY UPDATE结构(在 SQL Server 中不支持,但其他数据库如 MySQL 支持)。在 SQL Server 中,我们可以用以下方式...
ERROR: 1022 SQLSTATE:(23000) ER_DUP_KEY Message: Can't write; duplicate key in table ‘residential_address’ CREATE TABLE town ( town_id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, town_name VARCHAR (30) NOT NULL, ); CREATE TABLE residential_address ...