I am trying to use a inner join with an update statement with a subquery ... can you help me out with the sytax please --- and also how do you use the AS clause for alias in sql server???
the following is what i am trying to do :
Update Table1
inner join table2
set table1.value1 = (select table2.value1 where table1.value 1 ....)
any idea??
If you need to use a subquery to perform the UPDATE you can do it this way:
UPDATE t1
SET t1.value = t2.value
FROM Table1 t1
JOIN
(
SELECT id, value
FROM table2
) t2
ON t1.id = t2.id
One way is to alias the table:
update t1
set table1.value1 = t2.value1
from table1 as t1
join table2 as t2
on t1.id = t2.t1_id
You should try
UPDATE table1 SET t1.value1 = t2.value2
FROM table1 t1
INNER JOIN table2 t2
ON t1.field1 = t2.field2
UPDATE Table1 t1
INNER JOIN (
SELECT id, value
FROM table2
) t2 USING(id)
SET t1.value = t2.value
Related
I have an sql update statement:
update table1 set col1='val' where id in (select t2.id
from table2 t2
inner join table1 t1 on t1.id = t2.id
where t1.col2='val2' and t2.col3='val3');
Is there a better way to write it? I am thinking somehow not to use join since I have the table in the update construction.
Maybe:
update table1 set col1='val' where id in (select t2.id
from table2 t2
where t2.col3='val3')
and t1.col2='val2';
Is it better the last query?
Maybe with exists() ?
UPDATE table1 s
SET s.col1='val'
WHERE EXISTS(SELECT 1 FROM table2 t
WHERE s.id = t.id AND someCondition)
I'm looking to do what I believe is a double-nested check across three tables, but have no idea how to do so.
I have Table1, Table2, and Table3.
All are tied by an ID and a "Longform" and "Shortform" in Table1:
I'm trying to find:
Entries whose IDs appear in Table2 that have the same Longform as those in Table3, but don't share the same Shortform.
This is about as far as I've gotten:
SELECT T2.Longform,T2.Shortform FROM(
SELECT Table1.Longform,Table1.Shortform,Table1.ID FROM OuterTable1.Table1
LEFT JOIN OuterTable2.Table2 on Table1.ID = Table2.ID)
WHERE Table2.ID IS NOT NULL) T2
;
I know I'm probably going to have to do another nested select, or a join, on Outertable3.Table3 but I'm not sure which... Or where...
Any help appreciated as always.
Try the following:
Select *
(
Select T1.*
from T2
inner join T1
on T1.ID = T2.ID
) as Tab
inner join
(
Select T1.*
from T3
inner join T1
on T1.ID = T3.ID
) as Tab2
on Tab.id = Tab2.id
and Tab.Longform = Tab2.Longform
and Tab.Shortform <> Tab2.Shortform
To get the longform join table1 to table2 or table3. Then use EXISTS to check in a subquery if the IDs of table1 are different but the longform is equal.
SELECT *
FROM table2 t21
INNER JOIN table1 t11
ON t11.id = t21.id
WHERE EXISTS (SELECT *
FROM table3 t32
INNER JOIN table1 t12
ON t12.id = t32.id
WHERE t12.id <> t11.id
AND t12.longform = t11.longform);
Assuming ID is unique in all three tables
Select t2.id,t2.shortform, t1.shortform AS shortformTab1, t2.longform
FROM table2 t2
JOIN table3 t3
ON t2.id = t3.id AND t2.longform = t3.longform
JOIN table1 t1
ON t2.id = t1.id AND t2.shortform != t1.shortform
I want to select t2 column values (Name) and update with t1 column values (Name) without where clause. what will be the query?
I am executing below code:
update t1 set t1.name=t2.name from t2 where t1.id=t2.id
but I want to perform it without WHERE clause.
Join both tables on id:
UPDATE t1 SET t1.Name = t2.Name
FROM TableName1 t1
INNER JOIN TableName2 t2 ON t1.Id = t2.Id
We use MERGE nowadays:
MERGE t1 USING t2 ON t1.id = t2.id
WHEN MATCHED THEN
UPDATE SET name = t2.name;
just do it
UPDATE t1
SET t1.name=t2.name
FROM table1 t1 INNER JOIN table2 t2 ON t1.id=t2.id
How can I update multiple rows in one query?
I have something like this:
update POL_VYMFOND set fk_vsoub='2245'
where fk_vsoub in (select HL_VYMSOUB.ID_VSOUB
from POL_VYMSEZN
inner join HL_VYMSEZN
on HL_VYMSEZN.ID_VSEZN=POL_VYMSEZN.FK_VSEZN
inner join HL_VYMSOUB
on HL_VYMSOUB.FK_VSEZN=HL_VYMSEZN.ID_VSEZN
where POL_VYMSEZN.FK_BUDOVA='4')
but definitely wrong.
Is it possible to do this?
I would like to change column values in one table according to values from another table.
Thank you
Generic answer for future developers.
SQL Server
UPDATE
t1
SET
t1.column = t2.column
FROM
Table1 t1
INNER JOIN Table2 t2
ON t1.id = t2.id;
Oracle (and SQL Server)
UPDATE
t1
SET
t1.colmun = t2.column
FROM
Table1 t1,
Table2 t2
WHERE
t1.ID = t2.ID;
MySQL
UPDATE
Table1 t1,
Table2 t2
SET
t1.column = t2.column
WHERE
t1.ID = t2.ID;
Firebird 2.1
UPDATE dest_table t1
SET
field1 = (select field1 from src_table t2 where t2.pk = t1.pk),
field2 = (select field2 from src_table t2 where t2.pk = t1.pk)
WHERE EXISTS (select 1 from src_table t2 where t2.pk = t1.pk)
For other versions of Firebird please check this link
Hope this will help you, and will solve your issue.
I have two tables T1 and T2
T1
-id
-columnA
-columnB
-columnC
T2
-id
-columnX
-columnY
-columnZ
I have a query like
Select t1.* t2.columnZ
from T1 t1
left join on T2 t2 on t1.id = t2.id
where t2.columnZ = 'test'
I want result like if "where t2.columnZ = 'test'" does not return any row then it should return value of columnZ as null value
Try:
SELECT t1.*
, t2.columnZ
FROM T1 t1
LEFT JOIN T2 t2
ON t1.id = t2.id
AND t2.columnZ = 'test'
You also missed a comma, and you had a misplaced on.