Oracle db中 CONNECT role的含義,oraclerole

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Oracle db中 CONNECT role的含義,oraclerole
出自:Complete Checklist for Manual Upgrades to 11gR2 (文檔 ID 837570.1)該文章中有如下的文字:From Oracle 10.2, 'CONNECT' role only includes 'CREATE SESSION' privilege.

oracle 提示connect internal only? 什意思

oracle沒啟動吧。
處理:
1.lsnrctl start
2.sqlplus /nolog
3.conn / as sysdba
4.startup
 
oracle中1=1是什,舉個例子

1=1即為true,用在where條件或是迴圈語句,
select * from table where 1=1即查詢滿足1=1的所有資料,此時where條件相當於沒有生效
說白了這語句就是沒用,不過這種情況一般用於語句拼接,
在where 1=1 之後可以任意拼接條件,直接拼接and A=‘a’之類的
這樣省去了判斷前面是否有where關鍵字和是否需要加and關鍵字
 

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