Showing posts with label TSQL Beginner. Show all posts
Showing posts with label TSQL Beginner. Show all posts
Tuesday, December 27, 2016
Tuesday, July 26, 2016
Monday, July 25, 2016
Monday, April 4, 2016
SQL Tutorial In Urdu - TSQL Case Statement
-- Example 1
SELECT StudentId, Name, Email, Mobile,
CASE RegistrationType
WHEN 1 THEN 'Online'
WHEN 2 THEN 'In Person'
WHEN 3 THEN 'By Phone'
WHEN 4 THEN 'Email'
WHEN 5 THEN 'By Post'
END AS 'Registration Type'
, DateOfRegistration, Gender
FROM [dbo].[Students]
-- Example 2
SELECT ResultId,
StudentId,
ReleaseDate,
ExamTotal,
StudentTotal
, CASE WHEN [StudentTotal] < 300 THEN 'Fail' ELSE 'Pass' END AS Result
, CASE
WHEN ([StudentTotal] * 100.0 /[ExamTotal]) > 80 THEN 'A1'
WHEN ([StudentTotal] * 100.0 /[ExamTotal]) > 70 THEN 'A'
WHEN ([StudentTotal] * 100.0 /[ExamTotal]) > 60 THEN 'B'
WHEN ([StudentTotal] * 100.0 /[ExamTotal]) > 50 THEN 'C'
WHEN ([StudentTotal] * 100.0 /[ExamTotal]) >= 40 THEN 'D'
WHEN ([StudentTotal] * 100.0 /[ExamTotal]) < 40 THEN 'F'
END AS Grade
FROM [dbo].[StudentResults]
SQL Tutorial In Urdu - Temporary Table And Table Variable (SQL Server)
-- Temporary Table CREATE TABLE #StudentData (Id INT, Gender NVARCHAR(50)) INSERT INTO #StudentData (Id, Gender) SELECT [StudentId], [Gender] FROM [dbo].[Students] SELECT COUNT(Id) AS Total , Gender FROM #StudentData GROUP BY Gender DROP TABLE #StudentData -- Table Variable DECLARE @StudentData TABLE (Id INT, Gender NVARCHAR(50)) INSERT INTO @StudentData (Id, Gender) SELECT [StudentId], [Gender] FROM [dbo].[Students] SELECT COUNT(Id) AS Total , Gender FROM @StudentData GROUP BY Gender -- Real World Example (Find Total Students Pass and Fail) SELECT COUNT(StudentId) AS Total ,Gender FROM [dbo].[Students] GRoup by Gender -- Temporary Table CREATE TABLE #StudentInfo (Id INT, Result NVARCHAR(50)) INSERT INTO #StudentInfo (Id, Result) SELECT StudentId , CASE WHEN [StudentTotal] < 300 THEN 'Fail' ELSE 'Pass' END AS Result FROM [dbo].[StudentResults] SELECT COUNT(Id) AS Total ,Result FROM #StudentInfo GROUP BY Result DROP TABLE #StudentInfo -- Table Variable Declare @StudentInfo TABLE (Id INT, Result NVARCHAR(50)) INSERT INTO @StudentInfo (Id, Result) SELECT StudentId , CASE WHEN [StudentTotal] < 300 THEN 'Fail' ELSE 'Pass' END AS Result FROM [dbo].[StudentResults] SELECT COUNT(Id) AS Total ,Result FROM @StudentInfo GROUP BY Result
Friday, July 4, 2014
Subscribe to:
Posts (Atom)