SQL批量删除与批量插入

批量删除:

DELETE FROM MyTable WHERE ID IN (1,2);

批量插入:

INSERT INTO MyTable(ID,NAME) VALUES(1,'123');
INSERT INTO MyTable(ID,NAME) VALUES(2,'456');
INSERT INTO MyTable(ID,NAME) VALUES(3,'789');

第二种方法,使用UNION ALL来进行插入操作:    
INSERT INTO MyTable(ID,NAME)
SELECT 4,'000'
UNION ALL
SELECT 5,'001'
UNION ALL
SELECT 6,'002' ;
据说要比第一种要快!

第三种方法  
INSERT INTO MyTable(ID,NAME) VALUES(7,'003'),(8,'004'),(9,'005');

Example:

表: leafjob(
leafnum INT NOT NULL PRIMARY KEY,
machine VARCHAR(15) );

删除:delete from leafjob where leafnum in (1,2,4);

插入:

INSERT INTO leafjob (leafnum, machine) values(1, 'r1leaf3'), (2, 'r1leaf22');

insert into leafjob(leafnum, machine) select 4,'000' union all select 1,'r1leaf3' union all select 2,'r1leaf22';

insert into leafjob(leafnum, machine) select 1,'r1leaf3' union select 2,'r1leaf22';

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