db2: update multiple rows and field with a select on a different table
is it possible to increment the field a and b of a table (A.a and A.b) using the value c and d of a different table (B.c B.d) for all the row of A where A.x == B.z?
I'm getting crazy with this query
DB2 and the SQL standard don't have a FROM clause in an UPDATE statement. So you have to clearly separate the steps to
- identify the rows to be modified and to
- compute the new value.
Here is an example:
UPDATE TABLE A SET A.FLD_SUPV = ( SELECT B.FLD_SUPV FROM TABLEA A, TABLEB B, TABLEC C,TABLED D WHERE A.FLD1= B.FLD1 AND A.FLD_DT >= B.FLD_FM_DT AND A.FLD_DT <= B.FLD_THRU_DT AND A.FLD_DT > D.FLD_THRU_DT AND A.FLD_DT < C.FLD_EFF_DT ) WHERE EXISTS ( SELECT B.FLD_SUPV FROM TABLEA A, TABLEB B, TABLEC C,TABLED D WHERE A.FLD1= B.FLD1 AND A.FLD_DT >= B.FLD_FM_DT AND A.FLD_DT <= B.FLD_THRU_DT AND A.FLD_DT > D.FLD_THRU_DT AND A.FLD_DT < C.FLD_EFF_DT )
To update two fields you may use an example like this:
UPDATE table1 t1 SET (col1, col2) = ( SELECT col3, col4 FROM table2 t2 WHERE t1.col8=t2.col9 )
The optimizer will see that the sub-queries in the SET and the FROM clause are identical and it should merge them in the internal execution plan.
db2: update multiple rows and field with a select on a different table, is it possible to increment the field a and b of a table (A.a and A.b) using the value c and d of a different table (B.c B.d) for all the row of A where A.x == B.z? DB2 SELECT Statement. The DB2 SQL SELECT follows the standard SQL SELECT clause, where we specify columns from the table. The SELECT clause can also be followed by the FROM or WHERE clause. The following is the DB2 SQL syntax when using the SELECT statement to retrieve data from the student table, along with certain conditions.
Yes it is possible. You can try something like this:
MERGE INTO A USING (SELECT c, d, z from B) B ON (A.x = B.z) WHEN MATCHED THEN UPDATE SET A.a = A.a + B.c, A.b = A.b + B.d;
You can read more about MERGE here.
Db2 UPDATE: Modifying Data of a Table By Examples, To change the existing data in a table, you use the following UPDATE statement. Second, specify a list of column c1, c2, …, cn and the corresponding value v1, v2, … vn that can view the modified data in the lists table by using the following SELECT statement: 2) Using Db2 UPDATE to update multiple rows example. DB2 Update multiple columns and rows with Values from another Table We often have to update data in one table based on some fields from another table. Most of the time we are running some kind of data fix and we need this capability rather than creating a program.
Tested under DB2 10.6
Practically the same as @jhnwsk, but with added table short cuts.
Merge into "PRODUCTION"."COUNTRY" as N using (SELECT OD.NAME,OD.KEY from "DEVELOPMENT"."COUNTRY" as OD) as O on (O.KEY = N.KEY) WHEN MATCHED THEN UPDATE SET N.NAME=O.NAME;
DB2 Update multiple columns and rows with Values from another , DB2 Update multiple columns and rows with Values from another Table. We often have to update data in one table based on some fields from another table. SELECT t2.column3, t2.column4, t2.column5, from second_table t2 where� The UPDATE statement updates the values of specified columns in rows of a table or view or activates an instead of update trigger. Updating a row of a view updates a row of the table on which the view is based if no instead of update trigger is defined for the update operation on the view.
This one also works quite good
update TableA A
set a = (select a from TableB B where A.x = B.z)
(select 1 from TableB B where A.x = B.z) ;
Update using select in DB2, An UPDATE without WHERE clause will update all the rows of the table. For those rows that don't have a matching address_id in table B , the subquery returns� First, specify the table name that you want to change data in the UPDATE clause. Second, assign a new value for the column that you want to update. In case you want to update data in multiple columns, each column = value pair is separated by a comma (,). Third, specify which rows you want to update in the WHERE clause.
UPDATE CS70P t1 SET (T1.TIPOCRE) = ( SELECT MOROSO FROM FCSALDOC t2 ,CS70P t1 WHERE t1.NUMCRE =t2.CODCTA )
update values based on values from another table, I assume LUW and a recently new one. Probably clearest to do with a MERGE statement like: MERGE INTO TA USING ( SELECT OLDLOGIN, NEWLOGIN� We often use the INSERT INTO SELECT statement to copy data from a table to another table; or to insert summary data of a table into another table. Db2 INSERT INTO SELECT examples 1) Insert rows from a table into another table example. Let’s create a table named simple_lists for the demonstration:
SQL db2 update query for multiple rows, update query in db2 using multiple tables db2 update from select db2 update table from another table db2 set statement update date column in db2 iseries sql � I want to update emails in table A with emails in Table B where the address_id matches. I have tried the below query : update TableA A set email=(select email from TableB B where A.address_id=B.address_id) But its updating all the emails to null where the address_id is not matching in TableA. Appreciate your help..
Db2 for i SQL: Inserting rows using a select-statement, You can use a select-statement within an INSERT statement to insert zero, one, With the exception of FOR READ ONLY, FOR UPDATE, or the OPTIMIZE clause Inserting rows from one table into another table does not affect any existing rows You should consider the following when inserting multiple rows into a table:. When you specify one of the preceding set operators (UNION, EXCEPT, or INTERSECT), Db2 processes each SELECT statement to form an interim result table, and then combines the interim result table of each statement. If the nth column of the first result table (R1) and the nth column of the second result table (R2) have the same result column name
UPDATE, Updating a row of a view updates a row of its base table, if no INSTEAD OF the statement can be mapped to a different authorization ID at the data source. The number of columns in the select list must match the number of column names. If multiple rows are updated within a single SQL transaction, the values for the� If you want to select distinct values of some columns in the select list, you should use the GROUP BY clause. In case a column contains multiple NULL values, DISTINCT will keep only one NULL in the result set. Db2 SELECT DISTINCT examples. We will use the authors table from the sample database for the demonstration.