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SQL String Functions

LPAD & RPAD mysql string function

We can pad a string from left or from right by using LPAD or RPAD function respectively. We will use some examples to understand how these functions works. Here we will take plus2net as our input sting.

Example of LPAD

SELECT LPAD('plus2net',13,'**');

The output is here


You can see we have plus2net of 8 characters long. To this we have added or Pad at left ( at starting ) so the resultant string is of total 13 chars length.
What if the required length is less than the original string?

SELECT LPAD('plus2net',2,'**');

The output is here


This is first two chars of our input sting only.

RPAD string function to right pad string in MySQL

MySQL RPAD string function is used to pad strings from right. We will use this function along with select query but it can be used along with any other string commands.

Here are some examples of RPAD function

select rpad('plus2net',15,'*')

The output is here plus2net*******

We have added another string to right of our input string and the final output is of length 15 char. One more example is here

SELECT rpad( 'plus2net', 15, 'abc' )

Output of this is plus2netabcabca

What happens if we give less than the input string length.

SELECT rpad( 'plus2net', 5, 'abc' )

Output will be plus2 ( Upto 5 char only )

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