The establishment of libraries in the SQL database environment, to achieve a variety of search functions, such as unconditional inquiry, simple criteria queries, multi-criteria query, use search function, or link with nested queries, and sort query results, insert delete update and stored procedures.

多条件查询
..........\1.sql
简单条件查询
............\1.sql
............\2.sql
............\3.sql
建表
....\1.sql
....\2.sql
使用函数查找
............\1.sql
无条件查询
..........\1.sql
..........\10.sql
..........\11.sql
..........\2.sql
..........\3.sql
..........\4.sql
..........\5.sql
..........\6.sql
..........\7.sql
..........\8.sql
..........\9.sql
用嵌套和联接进行查询
....................\1.sql
3.txt
插入、删除、更新与存储过程
..........................\1.sql
..........................\sql.txt
得到排序的查询结果
..................\1.sql

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