# count()

Here’s how to use count() function.

## A. count( x )

Description:

Compute x with each member of the sequence and then count the number of non-null sequence members of the new sequence.

Syntax:

 A.count(x) Equivalent to A.(x).count()

Note:

The function loops through members of sequence A to compute expression x and returns the number of records that make x non-null.

Parameters:

 A A sequence. x Generally an expression of a single field name, or a legal expression composed of multiple field names.

Return value:

An integer

Example:

 A 1 =demo.query("select * from EMPLOYEE") 2 =A1.count(HIREDATE) Count the number of records whose HIREDATE is not null 3 =A1.(SALARY+1000).count() Add 1,000 to each value of SALARY and then count the number of records

Related functions:

## A. count()

Description:

Count the number of non-null members in a sequence.

Syntax:

 A.count() Equivalent to count(x1,…,xn)

Note:

The function counts the number of the non-null members in the sequence A.

Parameters:

 A A sequence whose length is n

Return value:

An integer, which is the number of the non-null members in the sequence A

Example:

 A 1 =[1,2,3,4].count() 4 2 =[1,null,3,4].count() 3 3 =count(1,null,3,4) 3

Related functions: