ORA-01219: 數據庫或可插入數據庫未打開: 僅允許在固定表或視圖中查詢 oracle

一周沒用過oracle，打開數據庫的時候報錯：

執行請求的操作時遇到錯誤:

ORA-01219: 數據庫或可插入數據庫未打開: 僅允許在固定表或視圖中查詢
01219. 00000 - "database or pluggable database not open: queries allowed on fixed tables or views only"
*Cause: A query was issued against an object not recognized as a fixed
table or fixed view before the database or pluggable database has
been opened.
*Action: Re-phrase the query to include only fixed objects, or open the
database or pluggable database.
供應商代碼 1219

解決：

1、重啟電腦，不管用；

2、連接上sys后，執行下面語句：

select open_mode from v$database;

alter database open;
select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

　　

3、上面語句執行后基本正常，然后切換容器：

alter pluggable database orclpdb open;
alter session set container=orclpdb;