SQLite is a common function

SQLite common functions

SQLite has many built-in functions for working with string or numeric data. H ere are some useful SQLite built-in functions, all of which are case insensitive, which means you can use them in small or capital or mixed forms. For more information, please review SQLite's official documentation:

Serial number	Function & Description
1	SQLite Count function The SQLITE Count aggregation function is used to calculate the number of rows in a database table.
2	SQLITE MAX function The SQLITE MAX aggregate function allows us to select the maximum of a column.
3	SQLite MIN function The SQLite Min aggregate function allows us to select a minimum of a column.
4	SQLite AVG function The SQLite AVG aggregate function calculates the average of a column.
5	SQLite SUM function The SQLite SUM aggregate function allows for sum of a numeric column.
6	SQLite Random Function The SQLite Random function returns a pseudo-random integer between -922372036854775808 and +9223372036854775807.
7	SQLite ABS function The SQLite ABS function returns an absolute value of the numeric parameters.
8	SQLITE UPPER function The SQLITE UPPER function converts the string to uppercase letters.
9	SQLITE LOWER function The SQLITE LOWER function converts the string to lowercase letters.
10	SQLITE Length function The SQLite Length function returns the length of the string.
11	SQLITE SQLITE_VERSION function The SQLITE SQLITE_VERSION function returns the version of the SQLite library.

Before we begin to explain these function instances, let's assume that 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 calculate the number of rows in a database table. Here are some examples:

sqlite> SELECT count(*) FROM COMPANY;

The SQLite SQL statement above produces the following results:

count(*)
----------
7

SQLite MAX function

The SQLite MAX aggregation function allows us to select the maximum value for a column. Here are some examples:

sqlite> SELECT max(salary) FROM COMPANY;

The SQLite SQL statement above produces the following results:

max(salary)
-----------
85000.0

SQLite MIN function

The SQLite MIN aggregation function allows us to select the minimum value of a column. Here are some examples:

sqlite> SELECT min(salary) FROM COMPANY;

The SQLite SQL statement above produces the following results:

min(salary)
-----------
10000.0

SQLite AVG function

The SQLite AVG aggregation function calculates the average value of a column. Here are some examples:

sqlite> SELECT avg(salary) FROM COMPANY;

The SQLite SQL statement above produces the following results:

avg(salary)
----------------
37142.8571428572

SQLite SUM function

The SQLite SUM aggregation function allows the sum to be calculated for a numeric column. Here are some examples:

sqlite> SELECT sum(salary) FROM COMPANY;

The SQLite SQL statement above produces the following results:

sum(salary)
-----------
260000.0

SQLite RANDOM function

The SQLite RANDOM function returns a pseudo-random integer between -9223372036854775808 and s9223372036854775807. Here are some examples:

sqlite> SELECT random() AS Random;

The SQLite SQL statement above produces the following results:

Random
-------------------
5876796417670984050

SQLite ABS function

The SQLite ABS function returns the absolute value of the numeric argument. Here are some examples:

sqlite> SELECT abs(5), abs(-15), abs(NULL), abs(0), abs("ABC");

The SQLite SQL statement above produces the following results:

abs(5)      abs(-15)    abs(NULL)   abs(0)      abs("ABC")
----------  ----------  ----------  ----------  ----------
5           15                      0           0.0

SQLite UPPER function

The SQLite UPPER function converts strings to capital letters. Here are some examples:

sqlite> SELECT upper(name) FROM COMPANY;

The SQLite SQL statement above produces the following results:

upper(name)
-----------
PAUL
ALLEN
TEDDY
MARK
DAVID
KIM
JAMES

SQLite LOWER function

The SQLite LOWER function converts strings to lowercase letters. Here are some examples:

sqlite> SELECT lower(name) FROM COMPANY;

The SQLite SQL statement above produces the following results:

lower(name)
-----------
paul
allen
teddy
mark
david
kim
james

SQLite LENGTH function

The SQLite LENGTH function returns the length of the string. Here are some examples:

sqlite> SELECT name, length(name) FROM COMPANY;

The SQLite SQL statement above produces the following results:

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 returns the version of the SQLite library. Here are some examples:

sqlite> SELECT sqlite_version() AS 'SQLite Version';

The SQLite SQL statement above produces the following results:

SQLite Version
--------------
3.6.20