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@millken
Created November 5, 2010 05:18
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MYSQL技巧
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。
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