taofoki.blogg.se - Mysql like vs substring

#Mysql like vs substring how to#
#Mysql like vs substring code#

SELECT FIND_IN_SET( 'a', NULL) Code language: SQL (Structured Query Language) ( sql ) The following statement also returns NULL because the second argument is NULL. SELECT FIND_IN_SET( NULL, 'x,y,z') Code language: SQL (Structured Query Language) ( sql ) The following statement returns NULL because the first argument is NULL. SELECT FIND_IN_SET( 'a', '') Code language: SQL (Structured Query Language) ( sql ) The following statement also returns 0 because the second argument is empty. SELECT FIND_IN_SET( 'a', 'x,y,z') Code language: SQL (Structured Query Language) ( sql ) The following statement returns 0 because a is not in the 'x,y,z' list. SELECT FIND_IN_SET( 'y', 'x,y,z') - 2 Code language: SQL (Structured Query Language) ( sql ) The following statement returns 2 because y has the second position in 'x,y,z' string. A) MySQL FIND_IN_SET() function simple examples Let’s take some examples to understand how the MySQL FIND_IN_SET works.

In addition, MySQL will use bit arithmetic optimization if the needle is a constant string and the haystack is a column of type SET. Note that the function will not work properly if the needle contains a comma (,).

Return a positive integer if the needle is in the haystack.

Return zero if the needle is not in the haystack or the haystack is an empty string.

Return a NULL value if either needle or haystack is NULL.

The FIND_IN_SET() function returns an integer or a NULL value depending on the value of the arguments:

The second parameter haystack is a list of comma-separated strings that to be searched.

The first parameter needle is the string that you want to find.

The FIND_IN_SET function accepts two parameters: The following illustrates the syntax of the FIND_IN_SET function: FIND_IN_SET(needle,haystack) Code language: SQL (Structured Query Language) ( sql ) MySQL provides a built-in string function called FIND_IN_SET() that allows you to find the position of a string within a comma-separated list of strings. Introduction to MySQL FIND_IN_SET() function

#Mysql like vs substring how to#

Summary: in this tutorial, you will learn how to use the MySQL FIND_IN_SET() function to return the position of a string in a comma-separated list of strings.