添加自动增量mysql
代码示例
mysql查询结果中的auto increment列
SET @auto_increment=0;
SELECT @auto_increment := @auto_increment+1 AS `No`;插入到自动递增mysql
/* To insert into an auto incrementing field without specifing every column in
the table, you can use the key word default in the place of the auto
incrementing column*/
INSERT IGNORE INTO my_table VALUES(default, "test1", 222)
/*VS */
INSERT IGNORE INTO my_table(name, num) VALUES("test1", 222)
/*Having to type out all of the column names except the auto incrementing one
can be very tedious when you have many columns, just use the keyword defualt
instead and you only have to type it once.如何更改现有表mysql中的自动增量
ALTER TABLE tbl_access ADD COLUMN `access_id` int(10) NOT NULL PRIMARY KEY AUTO_INCREMENT FIRST
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