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
Related
I am trying to use the below query, its everytime saying cannot insert null for the second column.
UPDATE TABLE1
SET (COL1,COL2,COL3) = (SELECT COL1,COL2,COL3
FROM TABLE2
WHERE t1.id = t2.id);
Try this:
UPDATE TABLE1 SET (COL1,COL2,COL3) =
(SELECT COL1,NVL(COL2,0),COL3 FROM TABLE1 T1, TABLE2 T2 where t1.id = t2.id)
WHERE <YOUR WHERE CONDITION>
I would use a MERGE:
MERGE INTO TABLE1 t1
USING (SELECT id, COL1,COL2,COL3
FROM TABLE2) t2
ON (t1.id = t2.id)
WHEN MATCHED THEN UPDATE SET t1.COL1 = t2.COL1
, t1.COL2 = t2.COL2
, t1.COL3 = t2.COL3;
There are rows in table1 where not corresponding row exists in table2 thus the sub-query returns nothing which means the UPDATE statement will take that as null for all three columns.
You have to add a WHERE clause that only updates rows in table1 that do have a matching row in table2
UPDATE TABLE1
SET (COL1,COL2,COL3) = (SELECT COL1,COL2,COL3
FROM TABLE2 t2
WHERE table1.id = t2.id)
where exist (select *
from table2 t2
where table1.id = t2.id);
I am trying to update a table1 with a Column2 from table2 where id should match while inserting the Column2 values from table2 in table1 for SQL Server.
I tried with the below 2 sets of code, but it is not working.
Can anyone help me out with this?
alter table table1
add Column2 varchar(20)
insert into table1
Select t2.Column2
from table1 as t1
inner join table2 as t2
on t1.id = t2.id
And, below also:
Update table1
Set Column2 = (Select t2.Column2
from table1 as t1
inner join table2 as t2
on t1.id = t2.id)
Update t1
Set Column2 = t2.Column2
from table1 as t1
inner join table2 as t2
on t1.id = t2.id
I have table1 and table2. They have the same columns and the column ID is the one that i can use to connect the tables.
How can i run foreach statment that will update row Name in table1 with the value for column Name in table2?
I need this so i can fix the column Name in Table1 because it is incorect , and the good values for it are in table2
I tried using a single update statement but it takes forever to execute because both tables are with over 600 000 rows
update
table1 t1
set
(
t1.name
) = (
select
t2.name
from
table2 t2
where
t2.id = t1.id
and
rownum = 1
)
where exists (
select
null
from
table2 t2
where
t2.id = t1.id
);
For this query:
update table1 t1
set t1.name = (select t2.name from table2 t2 where t2.id = t1.id and rownum = 1)
where exists (select 1
from table2 t2
where t2.id = t1.id
);
You want an index on table2(id, name).
A simple inner join should work this.
UPDATE T1
SET T1.NAME = T2.NAME
FROM MyTable T1
INNER JOIN MyOtherTable T2
ON T1.ID = T2.ID
I want to update a record for a table and based on foreign key from other table..
Update table1 t1
Inner join table2 t2 on t2.id = t1. Id
Set t1. Name ='abc'
Where t2. User ='xyz';
That syntax is not valid in Oracle use MERGE
MERGE INTO table2 trg
using table1 src
ON (trg.id = src.id
AND trg.user = 'xyz')
WHEN matched THEN
UPDATE SET trg.NAME = 'abc';
You can also use Exists
Update table1
Set Name ='abc'
Where exists (select 1
from table2 t2
where t2.id = table1.Id
and t2.User ='xyz');
You can use this query
MERGE INTO table1 t1
USING table2 t2
ON (t1.id = t2.id and t2.User='xyz')
WHEN MATCHED THEN
update
set t1.Name = 'abc';
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