An error will occur when inserting a new record in MySQL if the primary key specified in the insert query already exists. Using the "IGNORE" keyword prevents errors from occuring and other queries are still able to be run. Why? Although you shouldn't normally attempt to insert a record wit...
An error will occur when inserting a new record in MySQL if the primary key specified in the insert query already exists. Using the "IGNORE" keyword prevents errors from occuring and other queries are still able to be run. Why? Although you shouldn't normally attempt to insert a record wit...
insert ignore into tb(...) value(...) 这样不用校验是否存在了,有则忽略,无则添加 三、ON DUPLICATE KEY UPDATE的使用 MySQL 自4.1版以后开始支持INSERT … ON DUPLICATE KEY UPDATE语法,使得原本需要执行3条SQL语句(SELECT,INSERT,UPDATE),缩减为1条语句即可完成。 例如ipstats表结构如下: 引用 CREATE TABLE...
mysql> insert into user (name,age)values("lzy",19); ERROR 1062 (23000): Duplicate entry 'lzy-19' for key 'uniq_name_age' 将会得到一个duplicate的error。 解决办法有三种: 1)insert ignore 如果有冲突就忽略,可以通过insert的返回值判断到底有没有冲突; mysql> insert ignore into user (name,age...
ERROR1062(23000):Duplicate entry'value'forkey'PRIMARY' 如果数据库中已有某条数据,以下的两条语句可等同: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 INSERTINTOtablename(id,data)VALUES(1,10)ONDUPLICATEKEYUPDATEdata=data+10; 代码语言:javascript ...
ERROR 1062 (23000): Duplicate entry ’1’ for key ’PRIMARY’ 但在实际场景中,发生唯一键冲突直接报错通常是我们不希望看到的。 解决这个报错问题方法通常有以下三种: replace into insert on duplicate key update insert ignore into 3. replace into ...
ERROR 1062 (23000): Duplicate entry 'Tom' for key 'uk_name' mysql>insert ignore into table_name values(2,'Tom',21); Query OK, 0 rows affected, 1 warning (0.00 sec) 如果业务逻辑需要插入重复数据时自动忽略,不妨试试MySQL 的 insert ignore 功能。
Re: Insert Ignore / On Duplicate Key - Conversion 2803 Jim Taylor February 25, 2012 04:27PM Re: Insert Ignore / On Duplicate Key - Conversion 2902 santino6250 santino February 28, 2012 01:17AM Sorry, you can't reply to this topic. It has been closed....
ERROR 1062 (23000): Duplicate entry ‘john@example.com’ for key ’eml’如果我们想忽略这个错误，我们可以使用IGNORE选项：INSERT IGNORE INTO user (name, eml) VALUES (‘Karen’, ‘john@example.com’);这将使MySQL忽略违反约束条件的尝试，...
the INSERT statement are treated as warnings instead. For example, without IGNORE, a row that duplicates an existing UNIQUE index or PRIMARY KEY value in the table causes a duplicate-key error and the statement is aborted. With IGNORE, the row still is not inserted, but no error is issued...