read in select data from another table

Hello world.

IM Oracle11GR2 database.

I m facing the following problem:

I have 2 tables.

In the first picture, I have a few articles and 3 of these items then come.

(A) point Varchar2

(B) Item Varchar2.

If the digital point > 0 then points A and B must be read in the second table

In the second table, I have 3 Articles.

(A) the id of the record.

B & C point are also point varchar2 and must be read in the first table, point C is > 0.

I'm looking for the way that when I write a normal selection in the first picture he gives me the point B & C of the second table if C point in the first table is > 0.

I thought to solve this problem with a trigger or something similar.

Any idea is welcome.

Regards to everyone.

You don't need a trigger for this. A simple select statement should do. Something like that? I got your if condition perfectly.

SELECT CASE WHEN (T1. C > 0) THEN (SELECT T2. B OF THE T2 WHERE T1. C = T2. (A) T1 OTHERWISE. END A,

BOX WHEN (T1. C > 0) THEN (SELECT T2. C FROM T2 WHERE T1. C = T2. (A) T1 OTHERWISE. B END HAVE B,

T1. C

FROM T1;

Look at the following example. Check if it fills your scenario.

-BEGINNING OF THE SAMPLE DATA

WITH T1 AS)

SELECT 'A' A, 'B' B, 1 C OF DOUBLE UNION ALL

SELECT 'C', ', 2 DOUBLE UNION ALL

SELECT 'DF', 'G', THE DOUBLE 0),

() AS T2

SELECT 1, 'X' B 'Y' C DOUBLE UNION ALL

SELECT 2, 'Z', 'BB' OF THE DOUBLE)

-END OF THE SAMPLE DATA

SELECT CASE WHEN (T1. C > 0) THEN (SELECT T2. B OF THE T2 WHERE T1. C = T2. (A) T1 OTHERWISE. END A,

BOX WHEN (T1. C > 0) THEN (SELECT T2. C FROM T2 WHERE T1. C = T2. (A) T1 OTHERWISE. B END HAVE B,

T1. C

FROM T1;

OUTPUT:

A B C

-- -- ----------

X Y 1 - since c > 0 A and B values in table 2 are replaced

Z BB 2 - since c > 0 A and B values in table 2 are replaced

DF G 0 - since c = 0, there is even value in table 1

Post edited by: Parth272025

Tags: Database

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