MySQL

And and Or in MySQL
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And

This can be used as dependently with where clause commands. And keyword can be used where we need to satisfy more than one condition or atleast two conditions(options) simultaneously need to satisfy within a command to get the desired output. Syntax of And with Where clause

SELECT expressions
FROM tables
WHERE columnname optionalvalue1 
AND column optionalvalue2;

 

so lets see some examples given below while using the previous database and its tables.

Example

SELECT * 					//show all values
FROM studadr					//studadr is a tablename
WHERE  country='India' 				//AND condition is given
AND locatn ='central' ;

output become

Note:

In the above code both optional value should lie in same row if they are in different row then no output will be shown as below.

Example

SELECT * 					//show all values
FROM studadr					//studadr is a tablename
WHERE  street = 'laxminagar' 			//Both condition not satisfy	
AND locatn = 'central' ;			

output become

Or

This also can be used as dependently with where clause commands.

Or keyword can be used where we need to satisfy any of one condition from minimum of two conditions simultaneously within a command. Syntax of Or with Where clause is define below

  • SELECT expressions
  • FROM tables
  • WHERE columnname optionalvalue1 or column optionalvalue2;

Example

SELECT *					//all values show
FROM studadr					//studadr is a tablename
WHERE locatn = 'central' 
OR country = 'india' ;				//OR conditions is given

output become

Note:

In the above example we wrote two different column value and output will print on the basis of its each condition.

Example

Another example of different variations in conditions.

SELECT * 					//all value show
FROM studadr					//studadr is a tablename
WHERE  locatn = 'central' 
OR locatn = 'saket';				//any condition need to follow

output become

Example

SELECT * 					//show all values
FROM studadr					//studadr is a tablename
WHERE locatn='central'				//any conditions write here
OR aid > 107

output become

Combination of And and Or within Where clause

Here we have define some example of combination of both condition in where clause.

Example

SELECT *					//show all values
FROM studadr					//studadr is a tablename
WHERE  locatn='central' 
AND ( country ='pakistan' 
OR country = 'india' );				//both condition is written here

output become

Example

Or vice-versa can be done

SELECT *					//show all values
FROM studadr				//studadr is a table name
WHERE locatn='central' 			//condition specified
OR ( country = 'india'
 AND country = 'pakistan')

Note

It gives the similar output as given by previous example, but it will show desire result according to the optional value or conditions specified.

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