TJay Belt


Technical Article

spAddField

spAddField is the proc I use to add all fields to the db in our upgrade scripts.  With this proc, you pass it the tablename, fieldname, datatype, and null or not null.  This will call spGetFieldsExists and see if the fields exists or not.  If it does, spAddField will drop that column.  Then it readds […]

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2002-03-05

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Question of the Day

Adding new column with DEFAULT

Which number will the COUNT() return after executing the following statements:

DROP TABLE IF EXISTS #test;
CREATE TABLE #test (id INT)
INSERT INTO #test (id)
SELECT *
  FROM GENERATE_SERIES(1, 3) AS gs
;

ALTER TABLE #test ADD flag BIT CONSTRAINT DF_#test_flag DEFAULT 0;
go
UPDATE #test SET flag = 0 WHERE id = 1
UPDATE #test SET flag = 1 WHERE id = 2

INSERT INTO #test (id) VALUES (4)

SELECT COUNT(*)
  FROM #test AS t
 WHERE flag = 0
 

See possible answers