Αποτελέσματα Αναζήτησης
15 Μαρ 2010 · You can do this: UPDATE table1 SET table1.value = (SELECT table2.CODE. FROM table2 . WHERE table1.value = table2.DESC) WHERE table1.UPDATETYPE='blah'
I have a table with about 5,000,000 records, the table have about 70 columns. I need to update 1 column (number) with a column from another table (around 350,000 records) based on a join value in the 2 tables. In the first table (the 5,000,000 record table) all the records will be updated.
18 Ιουν 2011 · UPDATE sample_table2 a SET R1_TOT_AVAIL = (select count(b.plan) from sample_table1 b where b.plan = a.plan and b.brand = a.brand and trim(b.reason) = 'nonbillable' group by b.plan, b.brand) R1_TOT_DURATION = (select sum(b.duration) from sample_table1 b where b.plan = a.plan and b.brand = a.brand and trim(b.reason) = 'nonbillable' group by b ...
5 Απρ 2023 · We want to update the T1.CODE and T1.DESCRIPTION values, using the values from T2.CODE and T2.DESCRIPTION using a join in the ID value. update t1 a set a.code = b.code, a.description = b.description from t2 b where a.id = b.id and b.id <= 5;
19 Φεβ 2015 · When you want to update multiple columns at once, you list all of the columns to be updated first, followed by all of the values to use (in the same order that the columns are listed). For example: UPDATE CONTACT C SET (C.PHONE, C.FAX) = ( SELECT P.PHONE, P.FAX FROM PERSON P WHERE P.PERSON_ID = C.PERSON_ID ) WHERE C.CURRENT_YEAR_ID = ( SELECT ...
27 Δεκ 2023 · Before diving into complex examples, let's understand the basic syntax of an update with a join operation in Oracle: sql UPDATE table1 SET table1.target_column = (SELECT table2.source_column FROM table2 WHERE table1.join_column = table2.join_column) WHERE EXISTS (SELECT 1 FROM table2 WHERE table1.join_column = table2.join_column); In the above ...
The simplest join checks if the values in a column from one table equal the values in a column from the other. For example, you can join toys and bricks where the toy_id equals the brick_id. Only the ids 2 & 3 are in both tables.
