/SQL/How to find all children of a record with only parent ID in sql

How to find all children of a record with only parent ID in sql

DECLARE @Table TABLE(
        ID INT,
        ParentID INT,
        NAME VARCHAR(20)
)

INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 1, NULL, 'A'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 2, 1, 'B-1'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 3, 1, 'B-2'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 4, 2, 'C-1'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 5, 2, 'C-2'


DECLARE @ID INT

SELECT @ID = 2

;WITH ret AS(
        SELECT  *
        FROM    @Table
        WHERE   ID = @ID
        UNION ALL
        SELECT  t.*
        FROM    @Table t INNER JOIN
                ret r ON t.ParentID = r.ID
)

SELECT  *
FROM    ret

Source: stackoverflow.com

Similar codes

2 votes377 views2 answers
Microsoft sql server extract hour and minute from datetime
SQL
0 vote383 views1 answer
Set column in all row mysql
SQL
14 votes385 views1 answer
Excel
SQL
1 vote300 views1 answer
Prevent duplicate rows in postgres
SQL
1 vote377 views1 answer
Is sql fast
SQL
0 vote330 views1 answer
How to drop columns with constraint from a table in sql script
SQL
1 vote350 views1 answer
How to give access to database in postgresql server to another user
SQL
3 votes379 views1 answer
Create a table with an id in mysql
SQL
2 votes360 views1 answer
When matched in sql server
SQL
0 vote336 views1 answer
SQL Server format datetime
SQL