forked from vincent/notebook
131 lines
3.9 KiB
Transact-SQL
131 lines
3.9 KiB
Transact-SQL
/***************************
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****************************
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* LES REQUÊTES A OPTIMISER *
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****************************
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***************************/
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/*
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SET STATISTICS IO OFF
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SET STATISTICS TIME ON
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--> 32867 IO
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DROP INDEX X ON T_EMPLOYEE_EMP;
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SEXE); --> 32867
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SERVICE); --> 32867
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SEXE) INCLUDE (EMP_SERVICE); --> 4535
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SEXE, EMP_SERVICE); --> 82
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SERVICE, EMP_SEXE); --> 77
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SERVICE) INCLUDE (EMP_SEXE); --> 77
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SEXE) WHERE EMP_SERVICE = 'RH';--> 54
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SEXE) WHERE EMP_SERVICE = 'RH' WITH (DATA_COMPRESSION = ROW); --> 48
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SEXE) WHERE EMP_SERVICE = 'RH' WITH (DATA_COMPRESSION = PAGE); --> 31
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SEXE) INCLUDE (EMP_SERVICE) WITH (DATA_COMPRESSION = PAGE);--> 1410
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CREATE INDEX X ON T_EMPLOYEE_EMP (EMP_SERVICE) INCLUDE (EMP_SEXE) WITH (DATA_COMPRESSION = PAGE); --> 36 (UC = 15, TE = 20)
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DROP INDEX XC ON T_EMPLOYEE_EMP
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CREATE COLUMNSTORE INDEX XC ON T_EMPLOYEE_EMP (EMP_SERVICE, EMP_SEXE); --> 3 segments (UC = 500, TE = 300)
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(UC = 0, TE = 4 ms
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-- vue indexée
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CREATE VIEW V_EMP_SEXE_SERVICE
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WITH SCHEMABINDING
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AS
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SELECT EMP_SERVICE, EMP_SEXE, COUNT_BIG(*) AS NOMBRE
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FROM [dbo].[T_EMPLOYEE_EMP]
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GROUP BY EMP_SERVICE, EMP_SEXE;
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GO
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CREATE UNIQUE CLUSTERED INDEX XV ON V_EMP_SEXE_SERVICE (EMP_SERVICE, EMP_SEXE);
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GO
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Si version Standard alors utiliser le tag NOEXPAND et la vue
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*/
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-- 1
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SELECT COUNT(*), EMP_SEXE
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FROM T_EMPLOYEE_EMP
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WHERE EMP_SERVICE = 'RH'
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GROUP BY EMP_SEXE;
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-- 2
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SELECT COUNT(*) AS NOMBRE, 'Homme' AS SEXE
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FROM T_EMPLOYEE_EMP
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WHERE EMP_SERVICE = 'RH'
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AND EMP_SEXE = 'Homme'
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UNION
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SELECT COUNT(*) AS NOMBRE, 'Femme' AS SEXE
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FROM T_EMPLOYEE_EMP
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WHERE EMP_SERVICE = 'RH'
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AND EMP_SEXE = 'Femme';
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GO
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-- 3
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SELECT COUNT(*) AS HOMME,
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(SELECT COUNT(*)
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FROM T_EMPLOYEE_EMP
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WHERE EMP_SERVICE = 'RH'
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AND EMP_SEXE = 'Femme') AS FEMME
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FROM T_EMPLOYEE_EMP
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WHERE EMP_SERVICE = 'RH'
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AND EMP_SEXE = 'Homme';
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GO
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-- 4
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SELECT COUNT(*) - (SELECT COUNT(*)
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FROM T_EMPLOYEE_EMP E2
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WHERE E2.EMP_SERVICE = E1.EMP_SERVICE
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AND EMP_SEXE = 'Femme') AS HOMME,
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(SELECT COUNT(*)
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FROM T_EMPLOYEE_EMP E3
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WHERE E3.EMP_SERVICE = E1.EMP_SERVICE
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AND EMP_SEXE = 'Femme') AS FEMME
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FROM T_EMPLOYEE_EMP E1
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WHERE EMP_SERVICE = 'RH'
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GROUP BY EMP_SERVICE;
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GO
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-- 5
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SELECT SUM(CASE EMP_SEXE
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WHEN 'Homme' THEN 1
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WHEN 'Femme' THEN 0
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END) AS NOMBRE_HOMME,
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SUM(CASE EMP_SEXE
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WHEN 'Homme' THEN 0
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WHEN 'Femme' THEN 1
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END) AS NOMBRE_FEMME
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FROM dbo.T_EMPLOYEE_EMP
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WHERE EMP_SERVICE= 'RH';
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GO
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-- 6
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SELECT COUNT(EMP_SEXE) AS NOMBRE,
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CASE EMP_SEXE
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WHEN 'Femme' THEN 'Femme'
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WHEN 'Homme' THEN 'Homme'
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ELSE 'Unknown'
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END AS SEXE
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FROM dbo.T_EMPLOYEE_EMP
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WHERE EMP_SERVICE= 'RH'
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GROUP BY EMP_SEXE;
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GO
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-- 7
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SELECT COUNT(*) AS Nombre, 'Femme' AS Sexe
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FROM dbo.T_EMPLOYEE_EMP
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WHERE EMP_ID NOT IN (SELECT EMP_ID
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FROM dbo.T_EMPLOYEE_EMP
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WHERE EMP_SERVICE <> 'RH'
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OR EMP_SEXE = 'Homme')
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UNION ALL
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SELECT COUNT(*) AS Nombre, 'Homme' AS Sexe
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FROM dbo.T_EMPLOYEE_EMP
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WHERE EMP_ID NOT IN (SELECT EMP_ID
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FROM dbo.T_EMPLOYEE_EMP
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WHERE EMP_SERVICE <> 'RH'
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OR EMP_SEXE = 'Femme');
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GO
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