Created
November 5, 2010 05:18
-
-
Save millken/663673 to your computer and use it in GitHub Desktop.
MYSQL技巧
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| CREATE TABLE IF NOT EXISTS co_address LIKE address #复制address表结构到表co_address | |
| show tables #列出所有表 | |
| show create table address;#显示address的结构 | |
| select * into destTbl from srcTbl | |
| insert into destTbl(fld1, fld2) select fld1, 5 from srcTbl | |
| 以上两句都是将 srcTbl 的数据插入到 destTbl,但两句又有区别的: | |
| * 第一句(select into from)要求目标表(destTbl)不存在,因为在插入时会自动创建。 | |
| * 第二句(insert into select from)要求目标表(destTbl)存在,由于目标表已经存在,所以我们除了插入源表(srcTbl)的字段外,还可以插入常量,如例中的:5。 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment