mysql での挿入操作を解析する

INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]

    [INTO] tbl_name [(col_name,...)]

    VALUES ({expr | DEFAULT},...),(...),...

    [ ON DUPLICATE KEY UPDATE col_name=expr, ... ]

或：
INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]

    [INTO] tbl_name

    SET col_name={expr | DEFAULT}, ...

    [ ON DUPLICATE KEY UPDATE col_name=expr, ... ]

或：
INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]

    [INTO] tbl_name [(col_name,...)]

    SELECT ...

    [ ON DUPLICATE KEY UPDATE col_name=expr, ... ]

INSERT INTO tbl_name () VALUES();

insert into worker values(“tom”,”tom@yahoo.com”);

insert into worker values(‘tom','tom@yahoo.com'),(‘paul','paul@yahoo.com');

insert into worker (name) values (‘tom');

insert into worker (name) values (‘tom'), (‘paul');

insert into worker set name='tom';

INSERT INTO tbl_name (col1,col2) VALUES(15,col1*2);

--但不能这样

INSERT INTO tbl_name (col1,col2) VALUES(col2*2,15);

insert into tbl_name1(col1,col2) select col3,col4 from tbl_name2;

--如果每一列都有数据

insert into tbl_name1 select col3,col4 from tbl_name2;

--假设a,b为唯一索引,表table没有1,2这样的行是正常插入数据，冲突时，更新c列的值

INSERT INTO table (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE c=3;

--或者是

INSERT INTO table (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE c=values(c);

--引用其他列更新冲突的行

INSERT INTO table (a,b,c) VALUES (1,2,3),(4,5,6) ON DUPLICATE KEY UPDATE c=VALUES(a)+VALUES(b);

 向一个已定义为NOT NULL的列中插入NULL。对于一个多行INSERT语句或INSERT INTO...SELECT语句，根据列数据的类型，列被设置为隐含的默认值。对于数字类型，默认值为0；对于字符串类型，默认值为空字符串('')；对于日期和时间类型，默认值为“zero”值。

insert into tbl_name1(a,b,c) 

  select col1,col2,col3 from tbl_name2 

ON DUPLICATE KEY UPDATE c=values(c);

INSERT DELAYED INTO worker (name) values (‘tom'), (‘paul');