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SET ROWCOUNT

Stop the processing after the number of rows has been affected.

Example:

Step-1: Create the Table and insert some sample data.

CREATE TABLE STUDENT
(
ID INT IDENTITY(1,1) PRIMARY KEY,
STUDENTNAME VARCHAR(100) NOT NULL ,
LIVINGLOCATION VARCHAR(100) NULL
)

INSERT INTO STUDENT(STUDENTNAME,LIVINGLOCATION)
SELECT 'Rakesh','Hyderabad'
UNION ALL
SELECT 'Raju','Delhi'
UNION ALL
SELECT 'Madhu','Hyderabad'
UNION ALL
SELECT 'Naresh',NULL
UNION ALL
SELECT 'Venaktesh','Chennai'

In above Insert Statement we inserted 5 sample records.

Step-2: Using SET ROWCOUT

SET ROWCOUNT 3;
SELECT * FROM STUDENT
ORDER BY ID DESC







It will affected 3 rows after that processing has been stopped.

Step-2: Using SET ROWCOUT 0

SET ROWCOUNT 0;
SELECT * FROM STUDENT
ORDER BY ID DESC









It will return all rows if ROWCOUNT IS 0.

Labels:

Comments

  1. UnknownFebruary 3, 2015 at 10:55 PM

    good

    ReplyDelete
  2. UnknownFebruary 4, 2015 at 6:05 AM

    hi sir, i have one doubt, how to retrive the particular second row using top clause method???

    ReplyDelete
    Replies
    1. kallurirakeshFebruary 4, 2015 at 6:39 AM

      This comment has been removed by the author.

      Delete
    2. kallurirakeshFebruary 4, 2015 at 6:48 AM

      This Query may helpfull

      CREATE TABLE EMPLOYEE
      (
      EMPID INT IDENTITY(1,1) PRIMARY KEY,
      EMPNAME VARCHAR(100),
      SALARY INT NOT NULL
      )

      INSERT INTO EMPLOYEE
      SELECT 'RAKESH',8000
      UNION ALL
      SELECT 'RAJU',1000
      UNION ALL
      SELECT 'NARESH',5000
      UNION ALL
      SELECT 'VENKATESH',5800

      SELECT * FROM (select *, ROW_NUMBER() OVER(ORDER BY Salary DESC) ROWNUM FROM Employee) a WHERE a.ROWNUM=2

      Delete
  3. kallurirakeshFebruary 4, 2015 at 6:47 AM

    CREATE TABLE EMPLOYEE
    (
    EMPID INT IDENTITY(1,1) PRIMARY KEY,
    EMPNAME VARCHAR(100),
    SALARY INT NOT NULL
    )

    INSERT INTO EMPLOYEE
    SELECT 'RAKESH',8000
    UNION ALL
    SELECT 'RAJU',1000
    UNION ALL
    SELECT 'NARESH',5000
    UNION ALL
    SELECT 'VENKATESH',5800


    SELECT TOP 1 * FROM (SELECT TOP 2 * FROM EMPLOYEE ORDER BY SALARY DESC) A ORDER BY SALARY

    ReplyDelete
  4. UnknownFebruary 4, 2015 at 11:56 PM

    Splendid !! I have learnt new concept

    ReplyDelete

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