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SQL

PL/SQL
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Transact-sql
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Using the DATALENGTH SQL Function
by Hannes Du Preez
Language: SQL, Expertise: Intermediate - Learn how to use a SQL function to return the length of a column in a table.
Employing DBCC PINTABLE and DBCC UNPINTABLE Functions
by Hannes du Preez
Language: SQL, Expertise: Advanced - See how to ensure a table always stays available in SQL Server's cache. You can Pin the table and Unpin it when it is not needed anymore.
Compress and Decompress SQL Functions
by Hannes Du Preez
Language: SQL, Expertise: Intermediate - Learn how to compress and decompress data in SQL.
Preventing SQL from Running on a Testing SQL Server
by Hannes Du Preez
Language: SQL, Expertise: Intermediate - See the two ways to prevent your SQL code from running on a testing or production server.
Creating an HTML Table with SQL
by Hannes du Preez
Language: SQL, Expertise: Intermediate - Learn how to produce HTML tables with this SQL example code.
Introducing the APPROX_COUNT_DISTINCT SQL Function
by Hannes du Preez
Language: SQL, Expertise: Intermediate - Learn how to return the approximate number of unique non-null values in a group.
Auto Start the SQL Server Agent Service
by Hannes du Preez
Language: SQL, Expertise: Intermediate - Learn how to ensure that your SQL Server Agent always restarts when the SQL Server restarts.
Using ENUM in MySQL Columns
by Sridhar M S
Language: SQL, Expertise: Intermediate - See how ENUMs are very powerful definitions and how they help attain data validation when the values are pre-defined.
Reverse Strings in SQL
by Hannes Du Preez
Language: SQL, Expertise: Intermediate - Learn learn more about a SQL query with which you can reverse strings.
Employ This SQL Stored Procedure to Rename a Column
by Hannes du Preez
Language: SQL, Expertise: Intermediate - See how to use sp_rename to rename a column in a table.
Generating Random Numbers in SQL
by Hannes Du Preez
Language: SQL, Expertise: Intermediate - Learn how to easily generate a random number.
Obtaining ASCII Values from Characters in SQL
by Hannes Du Preez
Language: SQL, Expertise: Intermediate - See how to use the ASCII function to return a character's ASCII value.
Using the HASHBYTES Function in SQL
by Hannes Du Preez
Learn how to use the hashbytes function in SQL.
Find Tables with an XML Column
by Hannes du Preez
Language: SQL, Expertise: Intermediate - See how to find tables with an XML column.
Update the Metadata of a Database Object
by Hannes du Preez
Language: SQL, Expertise: Intermediate - Learn how to refresh a database object with the help of the sp_refreshsqlmodule function.
Find Tables Referenced by Foreign Keys
by Hannes du Preez
Language: SQL, Expertise: Intermediate - Find tables referenced by foreign keys with a script similar to this one.
SQL Not Equal To Operator
by Hannes du Preez
Language: SQL, Expertise: Beginner - See two ways to indicate not equal to in SQL.
Getting Information About the Structure of Tables in SQL
by Hannes du Preez
Language: SQL, Expertise: Intermediate - Learn more about how to get information about the structure of the tables inside your database.
Using MySqlCheck
by M S Sridhar
Language: SQL, Expertise: Intermediate - Learn more about this MySQL utility that provides for verifying and taking corrective actions in case of failures.
Obtain the Oldest Open Transaction
by Hannes du Preez
Language: SQL, Expertise: Advanced - See how to determine the oldest transaction in SQL.
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