如何根据另一个表中的条件从一个表中创建 select 的存储过程

Question

For Example, I have 2 tables.

Table A has Setting/isActive

Table B has Name/Ages/City

So I want to retrieve records from B only when isActive = 1 for Setting ='GetThis' in Table A

something like

if 'GetThis' = 1 from table A
then get records from table B

Answer 1

Don't know which DBMS you're using, but look into the command IF EXISTS

Answer 2

If it should get all records from table B, you can try this;

Select b.name, b.ages, b.city from table_B b, table_A a where a.isActive = 1 and a.Setting ='GetThis' 

Answer 3

I ended up doing this

CREATE PROCEDURE GetAllRecords
@isActive BIT
SET @isActive = (Select isActive FROM TableA WHERE Setting = 'GetThis')

AS

IF @isActive = 1
BEGIN

SELECT * FROM TableB

END
GO;