SQLite Except Operator
SQLite EXCEPT operator is applied on multiple SELECT statements. It retrieves only the output of the first select statement and the output of the second select statement is not considered in the result set as we are using the EXCEPT operator.
To apply Except operator the below two conditions must be satisfied:
- The number of columns in the two select statements must be equal.
- Not only the count of columns the data type must be matched.
Syntax:
SELECT expression1, expression2, ... expression_n
FROM tables
[WHERE conditions]
EXCEPT
SELECT expression1, expression2, ... expression_n
FROM tables
[WHERE conditions];
Explanation of Syntax: In the syntax, mean we have two select statements followed by the expressions which means the column names from which you are going to fetch the data and where optional condition followed by the except operator.
The below image tells you how the SQLite Except operator works.
If we clearly observe above in the image then we can understand that the here in the image, the SQLite EXCEPT operator diagram will return the records which are in a color shaded area that means Except operator will return all the records from first Select statement except the records which exist in second Select statement.
SQLite Except Operator
SQLite is a server-less database engine written in C programming language. It is developed by D. Richard Hipp in the year 2000. The main motive for developing SQLite is to escape from complex database engines like MySQL etc. It has become one of the most popular database engines as we use it in Television, Mobile Phones, Web browsers, and many more. It is written simply so that it can be embedded into other applications.
In this article, you will learn about the SQLite Except operator, its working, and its functionality by using some examples. We will perform various queries with the practical implementation for an in-depth understanding of the article.