Solution to the problem of oracle stuck when executing update

reason:

Since there is no commit when PLSQL Developer executes update, oracle locks the record.

It can be solved by:

Query lock records first

Sql code

SELECT s.sid, s.serial# FROM v$locked_object lo, dba_objects ao, v$session s WHERE ao.object_id = lo.object_id AND lo.session_id = s.sid;

then delete the lock record

Sql code

ALTER system KILL session 'SID,serial#';  

The SID fills in the SID value found above, and serial# fills in the serial# column value, such as:

ALTER system KILL session '214,23456';