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cusor in sql

ekkamrit answered on December 23, 2022 Popularity 2/10 Helpfulness 1/10

answer cusor in sql

cusor in sql

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A cursor is a database object that is used to retrieve data from a result 
set one row at a time. It is often used to perform an operation on each row
in the result set.

-- Declare the cursor and open it
DECLARE cursor_name CURSOR FOR
    SELECT book_name,price FROM Book
OPEN cursor_name

-- Declare variables to hold the values of each column
DECLARE @col1 varchar(50), @col2 VARCHAR(50)

-- Fetch the first row from the cursor
FETCH NEXT FROM cursor_name INTO @col1, @col2

-- Loop through the result set
WHILE @@FETCH_STATUS = 0
BEGIN
    -- Perform an operation on the fetched row
    PRINT 'Column 1: ' + CAST(@col1 AS VARCHAR(5)) + ', Column 2: ' + @col2

    -- Fetch the next row from the cursor
    FETCH NEXT FROM cursor_name INTO @col1, @col2
END

-- Close and deallocate the cursor
CLOSE cursor_name
DEALLOCATE cursor_name

//prints below
-- Column 1: Book1, Column 2: 14485
-- Column 1: Book2, Column 2: 300
-- Column 1: Book3, Column 2: 14485
-- Column 1: Book4, Column 2: 400
-- Column 1: Book5, Column 2: 650
-- Column 1: Book6, Column 2: 400

Popularity 2/10 Helpfulness 1/10 Language sql

Source: Grepper

Tags: sql

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Contributed on Dec 23 2022

ekkamrit

0 Answers Avg Quality 2/10

cusor in sql

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