SQL35题解 | #批量插入数据，不使用replace操作#

题目已经先执行了如下语句:

drop table if exists actor;
CREATE TABLE actor (
   actor_id  smallint(5)  NOT NULL PRIMARY KEY,
   first_name  varchar(45) NOT NULL,
   last_name  varchar(45) NOT NULL,
   last_update  DATETIME NOT NULL);
insert into actor values ('3', 'WD', 'GUINESS', '2006-02-15 12:34:33');

对于表actor插入如下数据,如果数据已经存在，请忽略(不支持使用replace操作)

actor_id	first_name	last_name	last_update
'3'	'ED'	'CHASE'	'2006-02-15 12:34:33'

解题

INSERT IGNORE INTO actor
VALUES(
        3,
        'ED',
        'CHASE',
        '2006-02-15 12:34:33'
)

Use the INSERT IGNORE command rather than the INSERT command. If a record doesn't duplicate an existing record, then MySQL inserts it as usual. If the record is a duplicate, then the IGNORE keyword tells MySQL to discard it silently without generating an error.