MySQL

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This clause is used for pattern searching string or characters in the specified condtions, they require some characters for searching, they are known as the Wildcard Characteres which provides a easier way to search any related string or character value from the requested column. They can be categories into two ways , they are

TypeDescription
%Minimum 1 size of characters
_size of One character

Syntax

SELECT *   
FROM tablename  
WHERE Clause 
LIKE 'type_define';

The % define the any number of characters in which lname starting letter is 's' and display the following result.

Example

SELECT *
FROM studinfo 
WHERE lname
LIKE 's%' ;

If we want to add some additional condition like sid>105 then we can compute them also

Example

SELECT *
FROM studinfo 
WHERE sid > 105 AND lname
LIKE 's%' ;

 

Suppose wo know only the first and last character of any stored value we can also search them using the below command

Example

SELECT *
FROM studinfo 
WHERE lname
LIKE 's%a' ;

In this first character is 's' and last character is 'a' and % define the undefined size of character stored in the specified conditions

Example

SELECT *
FROM studinfo 
WHERE lname LIKE 's%a'
ORDER BY sid ;

The underscore ( _ ) defines one character space of any type can be present which help them to search the requested query

Example

SELECT *
FROM studinfo 
WHERE lname LIKE 's_ _ _ _a';

The above code we have 4 unspecified character between s and a so we have to insert 4 underscore( _ ) to get the desired output

In the above code we can also insert the conditions like sid > 105 and order by fname whose code is given below.

Example

SELECT *
FROM studinfo 
WHERE sid >105 lname LIKE 's_ _ _ _a'
ORDER BY fname;
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