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.
how to
How 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.
SQL 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!
Find Out Which Partition a Given Value Would be Mapped to in SQL Server (T-SQL)
If you have a partitioned table or index in SQL Server, and you want to determine which partition a given value would be mapped to, you can do this nice and quickly with the $PARTITION system function.
All you need to know is the name of the partition function (and of course, the value you’re interested in).
3 Ways to Return the Number of Rows in Each Partition in SQL Server (T-SQL)
If you’ve previously created a partitioned table in SQL Server, and you now want to know how many rows are being stored in each partition, here are three queries you can use.
In particular, you can:
- Query the
sys.dm_db_partition_statsview - Query the
sys.partitionsview - Use the
$PARTITIONfunction in a query
Below are examples of all three.
SQL CREATE TABLE … AS SELECT Statement
The SQL CREATE TABLE ... AS SELECT statement enables you to insert the results of a query into a new table.