I need to update table AGENT without primary key and unique rows, by the another talbe (select) AGENT_BOSS
Someting like that in MSSQL:
UPDATE AG
SET AGENT_BOSS_ID = AGB.AGENT_BOSS_ID
FROM AGENT AG
INNER JOIN AGENT_BOSS AGB ON (AG.AGENT_ID = AGB.AGENT_ID =)
NOTE: AGENT_ID is not UNIQUE in table AGENT