fresh initialize

Author: smpetersgithub

README.md

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+# Microsoft SQL Server Scripts
+
+This repository contains a collection of my SQL scripts saved in one convenient place.  Feel free to rummage around.  
+
+In the **Tools** folder, you'll find an assortment of useful scripts, including those for generating a well-structured calendar table, conducting data profiling, and offering quick fixes for common data issues I face on a routine basis.  These scripts are a little more involved and I include instructions on their usage. 
+
+The **Scripts** folder serves as a repository for all the scripts I employ to query system tables or provide some quick solutions to common problems.  These scripts are pretty straight forward, just follow the code comments at the top of each script.  
+
+:keyboard:      All SQL is written in Microsoft SQL Server T-SQL, unless otherwise noted.
+
+:question:      If you have any questions, please feel free to create a GitHub discussion. I am always happy to help out and explain different solutions.
+
+:mailbox:      If you find any inaccuracies, misspellings, bugs, dead links, etc., please report an issue! No detail is too small, and I appreciate all the help.
+
+:smile:      Happy coding!
+
+I hope you find this repository useful and informative, and I welcome any new puzzles or tips and tricks you may have. I also have a WordPress site where you can find my data analytics projects, Python puzzles, and blog.    
+
+**https://advancedsqlpuzzles.com**  

Scripts/AsciiValues.sql

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+/*
+Returns the ASCII values of a string
+
+This script loops through a string and displays
+all the ASCII characters in the string.
+*/
+DECLARE @vMyString VARCHAR(100) = 'Hello World';
+DECLARE @vLength INTEGER = LEN(@vMyString);
+DECLARE @vPosition INTEGER = 0;
+DECLARE @vAscii VARCHAR(MAX) = '';
+
+--Begin Loop
+WHILE @vLength >= @vPosition
+BEGIN
+  SELECT @vAscii = @vAscii + CONCAT(ASCII(SUBSTRING(@vMyString,@vPosition,1)),',');
+  SELECT @vPosition = @vPosition + 1;
+END;
+
+--Removes beginning and ending commas
+SET @vAscii = SUBSTRING(@vAscii,2,LEN(@vAscii)-2);
+
+SELECT @vAscii AS AsciiCodes;

Scripts/CursorExample.sql

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+/*
+Cursor Example
+
+A quick example of a Microsoft SQL Server cursor usage.
+https://learn.microsoft.com/en-us/sql/t-sql/language-elements/declare-cursor-transact-sql?view=sql-server-ver16
+*/
+
+DECLARE @vMyVariable VARCHAR(100);
+DECLARE test_cursor CURSOR FOR (SELECT 'Hello World' UNION SELECT 'Goodbye World');
+
+OPEN test_cursor;
+FETCH NEXT FROM test_cursor INTO @vMyVariable;
+    WHILE @@FETCH_STATUS = 0
+        BEGIN
+        PRINT(CONCAT('The value is ', @vMyVariable));
+        FETCH NEXT FROM test_cursor INTO @vMyVariable;
+        END
+CLOSE test_cursor;
+DEALLOCATE test_cursor;

Scripts/DropDatabase.sql

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+/*
+Drop Database
+
+Script template for dropping a database in Microsoft SQL Server.
+https://learn.microsoft.com/en-us/sql/t-sql/statements/drop-database-transact-sql?view=sql-server-ver16
+*/  
+USE MASTER;
+GO
+ALTER DATABASE <name> SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
+DROP DATABASE <name>;

Scripts/MissingIndexes.sql

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+/*
+Missing Indexes
+
+The following script finds missing indexes in Microsoft SQL Server.
+
+The tables used are:
+sys.dm_db_missing_index_groups
+sys.dm_db_missing_index_group_stats
+sys.dm_db_missing_index_details
+*/
+SELECT
+        GETDATE() AS runtime
+        ,@@Servername
+        ,REPLACE(REPLACE(mid.statement,']',''),'[','') AS tablename
+        ,migs.avg_total_user_cost
+        ,migs.avg_user_impact
+        ,migs.user_seeks
+        ,migs.user_scans
+        
+        --Pulled from the internet.
+        ,CONVERT (DECIMAL (28,1), migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans)) AS improvement_measure
+        ----------------------------
+        --Index creation syntax
+        ,'CREATE INDEX missing_index_' + 'INDEX_NAME ON ' + mid.statement + ' (' + ISNULL (mid.equality_columns,'') + 
+                    CASE WHEN mid.equality_columns IS NOT NULL AND mid.inequality_columns IS NOT NULL
+                         THEN ','
+                         ELSE ''
+                         END + ISNULL (mid.inequality_columns, '') + ')' + ISNULL (' INCLUDE (' + mid.included_columns + ')', '')
+        AS create_index_statement
+        ----------------------------
+        ,mid.database_id
+        ,mid.[object_id]
+FROM    sys.dm_db_missing_index_groups AS mig INNER JOIN
+        sys.dm_db_missing_index_group_stats AS migs ON migs.group_handle = mig.index_group_handle INNER JOIN
+        sys.dm_db_missing_index_details AS mid ON mig.index_handle = mid.index_handle
+WHERE    1=1
+         AND mid.statement NOT LIKE '%msdb%'
+ORDER BY
+        user_seeks desc,
+        migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans) DESC;
+--EXEC sp_helptext 'schecma.name'

Scripts/RandomNumbers.sql

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+/*
+Random Numbers
+
+The following script creates a table (#RandomNumbers) of random numbers between 1 and 10
+using the function ABS(CHECKSUM(NEWID()) % 10).
+
+The loop below produces 10,000 random numbers ranging from 1 to 10 and subsequently displays 
+the percentage distribution of these numbers to illustrate their randomness.
+*/
+DROP TABLE IF EXISTS #RandomNumbers;
+GO
+CREATE TABLE #RandomNumbers
+(
+MyRandomNumber INTEGER NOT NULL
+);
+GO
+DECLARE @i INTEGER = 1;
+DECLARE @loops INTEGER = 100000;
+WHILE @i <= @loops
+BEGIN
+    INSERT INTO #RandomNumbers SELECT ABS(CHECKSUM(NEWID()) % 10) + 1;
+    SET @i = @i + 1;
+END
+GO
+----------------------------------------------------------------
+----------------------------------------------------------------
+WITH cte_Total AS
+(
+SELECT COUNT(MyRandomNumber) AS MyTotal FROM #RandomNumbers
+),
+cte_Count AS
+(
+SELECT  MyRandomNumber, COUNT(*) AS MyCount
+FROM    #RandomNumbers a CROSS JOIN
+        cte_Total b
+GROUP BY MyRandomNumber
+)
+SELECT  MyRandomNumber, 
+        MyCount, 
+        MyCount / CAST(MyTotal AS NUMERIC(10,2))
+FROM    cte_Count a CROSS JOIN
+        cte_Total b;
+GO

Scripts/SQLServerAgentJobSteps.sql

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+/*
+SQL Server Agent Job Steps
+
+This SQL script prints out Microsoft SQL Server Agent job steps.
+
+dbo.sysjobsstep
+Contains the information for each step in a job to be 
+executed by SQL Server Agent. This table is stored in the msdb database.
+
+dbo.sysjobs
+Stores the information for each scheduled job to be executed by SQL Server Agent. 
+This table is stored in the msdb database.
+*/
+
+SELECT  @@SERVERNAME AS ServerName,
+        s.step_id AS 'StepID',
+        j.[name] AS 'SQLAgentJobName',
+        s.[database_name] AS 'DBName',
+        s.command AS 'Command'
+FROM    msdb.dbo.sysjobsteps s INNER JOIN 
+        msdb.dbo.sysjobs AS j ON s.job_id = j.job_id
+WHERE   1=1 
+        AND s.command LIKE '%example_command%';

Scripts/Sp_HelpText.sql

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+/*
+sp_helptext Example.
+
+sp_helptext displays the definition that is used to create an object in multiple rows. 
+Each row contains 255 characters of the Transact-SQL definition. 
+The definition resides in the definition column in the sys.sql_modules catalog view.
+https://learn.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-helptext-transact-sql?view=sql-server-ver16
+*/
+
+DECLARE @vTableVariable TABLE(SpText VARCHAR(MAX));
+DECLARE @vStoredProcedureName VARCHAR(255) = 'spTest';
+INSERT INTO @vTableVariable
+EXEC sp_helptext @vStoredProcedureName;
+SELECT * FROM @vTableVariable;
+

Scripts/StoredProcedureDefinition.sql

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+/*
+Stored Procedure Definition
+
+The following script prints out the body of a stored procedure.
+See also sp_helptext.
+*/
+
+SELECT  o.name, o.type_desc, o.create_date, o.modify_date, m.*
+FROM    sys.sql_modules m LEFT OUTER JOIN
+        sys.all_objects o on m.object_id = o.object_id
+WHERE   m.definition like  '%myText%';

Scripts/TableColumnNames.sql

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+/*
+Table Column Names
+
+This script searches for schemas, tables, columns, and data types within a database.
+Add the predicate logic you are searching for.
+*/
+
+--sys.schemas
+--sys.tables
+SELECT  @@SERVERNAME as ServerName,
+        s.name AS SchemaName,
+        t.name AS TableName
+FROM    sys.schemas s LEFT OUTER JOIN
+        sys.tables t ON s.schema_id = t.schema_id
+WHERE   1=1
+ORDER BY 1,2,3;
+
+--sys.schemas
+--sys.tables
+--sys.columns
+--sys.types
+SELECT  @@SERVERNAME as ServerName,
+        s.name AS SchemaName, 
+        t.name AS TableName, 
+        c.name AS ColumnName, 
+        ty.name as DataType,
+        CONCAT('SELECT * FROM ',s.name,'.',t.name,';') as QuickQuery
+FROM    sys.schemas s LEFT OUTER JOIN
+        sys.tables t ON s.schema_id = t.schema_id INNER JOIN
+        sys.columns c ON t.object_id = c.object_id INNER JOIN
+        sys.types ty ON ty.user_type_id = c.user_type_id
+WHERE   1=1
+ORDER BY 1,2,3,4;

Scripts/readme.md

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+## Overview
+Welcome to this GitHub repository, my go-to collection of SQL Server scripts that I have collected and saved to make life easier.
+
+## How to Use
+Feel free to rummage around.  I'm constantly adding and reorganizing this site, so if you cannot find anything, let me know, and I would be happy to help.
+
+## Notes
+:keyboard:      All SQL is written in Microsoft SQL Server T-SQL, unless otherwise noted.
+
+:question:      If you have any questions, please feel free to create a GitHub discussion. I am always happy to help out and explain different solutions.
+
+:mailbox:      If you find any inaccuracies, misspellings, bugs, dead links, etc., please report an issue! No detail is too small, and I appreciate all the help.
+
+:smile:      Happy coding!
+
+I hope you find this repository useful and informative, and I welcome any new puzzles or tips and tricks you may have. I also have a WordPress site where you can find my data analytics projects, Python puzzles, and blog.    
+
+**https://advancedsqlpuzzles.com**  
+
+

Tools/Calendar Table/FnReturnCalendarTable Example Use.sql

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+/*-----------------------------------------------------------------------
+Scott Peters
+Creating a Calendar Table
+https://advancedsqlpuzzles.com
+Last Updated: 01/11/2023
+Microsoft SQL Server T-SQL
+
+This script shows an example usage of the function FnReturnCalendarTable.
+
+*/-----------------------------------------------------------------------
+
+SET NOCOUNT ON;
+DROP TABLE IF EXISTS CalendarDaysTemp;
+GO
+
+--Create a temporary calendar table
+CREATE TABLE CalendarDaysTemp
+(
+DateKey INT NOT NULL PRIMARY KEY,
+CalendarDate DATE NOT NULL
+);
+GO
+
+-----------------------------------------------------
+-- Populate the CalendarTable
+DECLARE @vStartDate DATE = '2020-01-01';
+WHILE @vStartDate <> '2021-01-01'
+    BEGIN
+    INSERT INTO CalendarDaysTemp(DateKey, CalendarDate) VALUES
+        (
+        CONVERT(INT,CONVERT(VARCHAR, @vStartDate, 112)),
+        @vStartDate
+        );
+
+    SET @vStartDate = DATEADD(DAY,1,@vStartDate);
+    END;
+
+-----------------------------------------------------
+-----------------------------------------------------
+
+--Basic usage with CROSS APPLY
+SELECT  ct.*
+FROM    CalendarDaysTemp cd CROSS APPLY
+        FnReturnCalendarTable(cd.CalendarDate) ct
+WHERE   cd.DateKey = ct.DateKey;
+GO
+
+--Create a view
+CREATE OR ALTER VIEW VwCalendarTable AS
+SELECT  ct.*
+FROM    CalendarDaysTemp cd CROSS APPLY
+        FnReturnCalendarTable(cd.CalendarDate) ct
+WHERE   cd.DateKey = ct.DateKey;
+GO
+
+
+SELECT top 1 * FROM VwCalendarTable;