Prasad Chava

Bala Koteswara Prasad (Prasad) Chava is experienced in working on Microsoft .NET, SQL Server, Oracle, etc. He is a certified Microsoft professional developer. He has multiple professional certifications ranging from Salesforce, Azure, PMP and Dell Boomi. He is a member of the Project Management Institute (PMI). He has extensive experience in software architecture, solution delivery, and project management. He worked with many reputed organizations like IBM, Accenture, and Deloitte. He has extensive experience in TSQL and SQL server performance tuning.
  • Skills: C#.NET, ASP.NET, SQL Server, Oracle, Azure, Salesforce, Boomi, BizTalk, BMC Control-M, PMP

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Question of the Day

Adding new column with DEFAULT II

Which number did the two COUNT(*) return: 

DROP TABLE IF EXISTS #tmp
CREATE TABLE #tmp (id INT NOT NULL)

INSERT INTO #tmp (id) 
SELECT gs.value
  FROM GENERATE_SERIES(1, 5) AS gs

ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value

ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

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