摘要:
引用 :http://blog.csdn.net/cosio/article/details/3978747 , https://zhidao.baidu.com/question/628524115699308364.html block 块extent 区segment 段 --增加USERS表 阅读全文
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查询主键是哪几列select table_name,column_name from user_cons_columns a,( select constraint_name from user_constraints where table_name='TR_COUNTRY_BASE_M' and 阅读全文
摘要:
2019.7.17 15:44 add --字符内容含A或Cselect * from ( select 1 id, 'ABC' s1 from dual union all select 2 id,'AC' s1 from dual union all select 3 id,'BC' s1 fr 阅读全文