This page contains direct links to SQL tutorials and reference articles for beginners.
Continue readingAuthor: Ian
How to Map Multiple Partitions to a Single Filegroup in SQL Server (T-SQL)
If you’re familiar with creating partitioned tables in SQL Server, you might be used to creating a separate filegroup for each partition. This has its benefits, and may very well be the method you would choose in most scenarios.
However, you also have the option of mapping multiple partitions to a single filegroup.
In this article I share two examples of mapping multiple partitions to a single filegroup.
- Example 1 maps all partitions to a single filegroup.
- Example 2 maps some partitions to one filegroup, and some to another.
How to Rename a Table in SQL
In SQL, most RDBMSs allow you to rename a table using the ALTER TABLE statement, which is the statement used to modify the definition of an existing table.
Some RDBMs also include a RENAME statement for renaming tables.
But if you use SQL Server, you’ll need to use the sp_rename stored procedure.
SQL DROP TABLE for Beginners
In SQL, if you want to remove a table from a database, you need to use the DROP TABLE statement.
That destroys the table and all its data.
Continue readingHow to Drop a Foreign Key in SQLite
Normally if you need to drop a foreign key in SQL, you’d use the ALTER TABLE statement. But if you’re using SQLite, that’s not an option.
SQLite DROP TABLE
In SQLite, you can drop a table with the DROP TABLE statement.
You can optionally add the IF EXISTS clause to suppress any errors that might occur if the table doesn’t exist.
Also, if the table is referenced by a foreign key, there are a few things to be aware of.
Continue readingSQL DROP COLUMN for Beginners
In SQL, if you want to remove a column from a table, you need to use the ALTER TABLE statement with the DROP COLUMN clause.
That removes the column and all its data.
Continue readingSQL Tutorial for Beginners
In this SQL tutorial for beginners, you will create your own database, insert data into that database, and then run queries against that database.
This SQL tutorial will get you running SQL queries in no time!
Continue readingHow to Rename a Column in SQL
This article provides a quick example of renaming a table in SQL.
Most of the major RDBMSs allow you to rename a column with the ALTER TABLE statement. SQL Server is an exception.
SQL ALTER TABLE for Beginners
In SQL, the ALTER TABLE statement modifies the definition of an existing table.
You can use ALTER TABLE to alter, add, or drop columns and constraints.
Depending on your DBMS, the ALTER TABLE statement can also be used to reassign and rebuild partitions, or disable and enable constraints and triggers.