新概念英语(1-39)Don't drop it!
Where does Sam put the vase in the end ?
A:What are you going to do with that vase, Penny ?
B:I am going to put it on this table, Sam.
A:Don't do that. Give it to m...
sql drop index 语句
我们可以使用 drop index 命令删除表格中的索引。
用于 microsoft sqljet (以及 microsoft access) 的语法:
drop index index_name on table_name
用于 ms sql server 的语法:
drop index ...