[摘要] 1. 創(chuàng)建測(cè)試表TBL_STAT，及索引，但不插入記錄SQL> create table TBL_STAT as select * from dba_objects where 1<>1;Table created.SQL> create index idx_tbl_stat on tbl_stat[全文]
[摘要] 需求：現(xiàn)在oracle數(shù)據(jù)庫中有字段is_use 的有：null,0,1,2。現(xiàn)在需要查詢不等于2的數(shù)據(jù)解決辦法的sql：select * from uc_Users where nvl(is_use,'xx')<>'2'=======================================...[全文]
