Structured Query Language (SQL)
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Creating a database table
To declare a foreign key, you would use:
CHAR is a fixed-length string (will always be a set length)
VARCHAR is a variable-length string (will be any number up to a certain length)
Insert Into
The INSERT INTO statement is used to insert new records in a table.
Update
The UPDATE statement is used to modify the existing records in a table.
Delete
The DELETE statement is used to delete existing records in a table.
Querying single table
The SELECT statement is used to select data from a database.
Fetch all columns from a specific table:
Fetch specific fields from a table:
Fetch product names sorted by their price in the default ASCending order:
Fetch product names sorted by their price in the DESCending order:
The WHERE clause is used to filter records and select the rows of a table you want.
Querying multiple tables