SQLite Common Functions
SQLite has many built-in functions for handling string or numeric data. Below are some useful SQLite built-in functions, and all functions are case-insensitive, meaning you can use lowercase, uppercase, or mixed case forms of these functions. For more details, please refer to the official SQLite documentation:
| No. | Function & Description |
|---|---|
| 1 | SQLite COUNT Function The SQLite COUNT aggregate function is used to count the number of rows in a database table. |
| 2 | SQLite MAX Function The SQLite MAX aggregate function allows us to select the maximum value of a column. |
| 3 | SQLite MIN Function The SQLite MIN aggregate function allows us to select the minimum value of a column. |
| 4 | SQLite AVG Function The SQLite AVG aggregate function calculates the average value of a column. |
| 5 | SQLite SUM Function The SQLite SUM aggregate function allows calculating the sum for a numeric column. |
| 6 | SQLite RANDOM Function The SQLite RANDOM function returns a pseudo-random integer between -9223372036854775808 and +9223372036854775807. |
| 7 | SQLite ABS Function The SQLite ABS function returns the absolute value of a numeric argument. |
| 8 | SQLite UPPER Function The SQLite UPPER function converts a string to uppercase letters. |
| 9 | SQLite LOWER Function The SQLite LOWER function converts a string to lowercase letters. |
| 10 | SQLite LENGTH Function The SQLite LENGTH function returns the length of a string. |
| 11 | SQLite sqlite_version Function The SQLite sqlite_version function returns the version of the SQLite library. |
Before we start explaining these function examples, let's assume the COMPANY table has the following records:
ID NAME AGE ADDRESS SALARY ---------- ---------- ---------- ---------- ---------- 1 Paul 32 California 20000.0 2 Allen 25 Texas 15000.0 3 Teddy 23 Norway 20000.0 4 Mark 25 Rich-Mond 65000.0 5 David 27 Texas 85000.0 6 Kim 22 South-Hall 45000.0 7 James 24 Houston 10000.0
SQLite COUNT Function
The SQLite COUNT aggregate function is used to count the number of rows in a database table. Below is an example:
sqlite> SELECT count(*) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
count(*) ---------- 7
SQLite MAX Function
The SQLite MAX aggregate function allows us to select the maximum value of a column. Below is an example:
sqlite> SELECT max(salary) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
max(salary) ----------- 85000.0
SQLite MIN Function
The SQLite MIN aggregate function allows us to select the minimum value of a column. Below is an example:
sqlite> SELECT min(salary) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
min(salary) ----------- 10000.0
SQLite AVG Function
The SQLite AVG aggregate function calculates the average value of a column. Below is an example:
sqlite> SELECT avg(salary) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
avg(salary) ---------------- 37142.8571428572
SQLite SUM Function
The SQLite SUM aggregate function allows calculating the sum for a numeric column. Below is an example:
sqlite> SELECT sum(salary) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
sum(salary) ----------- 260000.0
SQLite RANDOM Function
The SQLite RANDOM function returns a pseudo-random integer between -9223372036854775808 and +9223372036854775807. Below is an example:
sqlite> SELECT random() AS Random;
The above SQLite SQL statement will produce the following result:
Random ------------------- 5876796417670984050
SQLite ABS Function
The SQLite ABS function returns the absolute value of a numeric argument. Below is an example:
sqlite> SELECT abs(5), abs(-15), abs(NULL), abs(0), abs("ABC");
The above SQLite SQL statement will produce the following result:
abs(5) abs(-15) abs(NULL) abs(0) abs("ABC")
---------- ---------- ---------- ---------- ----------
5 15 0 0.0
SQLite UPPER Function
The SQLite UPPER function converts a string to uppercase letters. Below is an example:
sqlite> SELECT upper(name) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
upper(name) ----------- PAUL ALLEN TEDDY MARK DAVID KIM JAMES
SQLite LOWER Function
The SQLite LOWER function converts a string to lowercase letters. Below is an example:
sqlite> SELECT lower(name) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
lower(name) ----------- paul allen teddy mark david kim james
SQLite LENGTH Function
The SQLite LENGTH function returns the length of a string. Below is an example:
sqlite> SELECT name, length(name) FROM COMPANY;
The above SQLite SQL statement will produce the following result:
NAME length(name) ---------- ------------ Paul 4 Allen 5 Teddy 5 Mark 4 David 5 Kim 3 James 5
SQLite sqlite_version Function
The SQLite sqlite_version function returns the version of the SQLite library. Below is an example:
sqlite> SELECT sqlite_version() AS 'SQLite Version';
The above SQLite SQL statement will produce the following result:
SQLite Version -------------- 3.6.20Other Extensions