摘要: 定义就不用说了吧！测试数据　test_tablecreatetabletest_table(u_idint,u_namevarchar(20))inserttest_tableselect1,'a1'unionallselect2,'b2'unionallselect3,'c3';测试数据　test_table_linkcreatetabletest_table_link(u_idint,u_ot...阅读全文