1. MySQL
update test1,test2
set test1.name=test2.name,test1.age=test2.age
where test1.id=test2.id
2. oracle
1. Multi-table association, update a certain field EX1 in the entire table
:
UPDATE REDREPORT T SET T.SSHY=(SELECT D.SSHY FROM DATA_COMPANY D WHERE T.DWDM =D.DWDM
and rownum=1 );
EX2:
update test1
set (test1.name,test1.age)=
(select test2.name,test2.age from test2 where test2.id=test1.id)
2. Multi-table association, update a certain field of the specified row
UPDATE "DATA_HISTORY_copy2" t
set SHJG = (select m.SHJG from DATA_MONTHCOPY m where t.DWDM = m.DWDM and SUBSTR(t.SQSJ, 0, 8) = SUBSTR(m.SQSJ, 0, 8))
WHERE EXISTS (select t.* from "DATA_HISTORY_copy2" t,DATA_MONTHCOPY m where t.DWDM = m.DWDM and SUBSTR(t.SQSJ, 0, 8) = SUBSTR(m.SQSJ, 0, 8))
3. SQLServer
update test1
set test1.name=test2.name,test1.age=test2.age
from test1
inner join test2
on test1.id=test2.id
4. Common method
update test1
set name=(select name from test2 where test2.id=test1.id),
age=(select age from test2 where test2.id=test1.id)
quote
[SQL] sql update Summary of multi-table association update methods .