For combining values of two or more columns, we can use MySQL CONCAT() function. In this case, the arguments of the CONCAT() functions would be the name of the columns. For example, suppose we have a table named ‘Student’ and we want the name and address of the student collectively in one column then the following query can be written −mysql> Select Id, Name, Address, CONCAT(ID, ', ', Name, ', ', Address)AS 'ID, Name, Address' from Student; +------+---------+---------+--------------------+ | Id   | Name    | Address | ID, Name, Address  | +------+---------+---------+--------------------+ | 1    | Gaurav  | Delhi   ... Read More

As we know that in MySQL by default || operator is a logical OR operator but it depends upon PIPES_AS_CONCAT SQL mode. If PIPES_AS_CONCAT SQL mode is enabled, then || operator works as string concatenation. At that time its precedence would be between ^ and the unary operator. Following example will make it understand −mysql> Set @C='tutorials'; Query OK, 0 rows affected (0.00 sec) mysql> Set @D='point'; Query OK, 0 rows affected (0.00 sec) mysql> Select @C||@D; +--------+ | @C||@D | +--------+ |      1 | +--------+ 1 row in set (0.00 sec)The result set of the ... Read More

Inequality means NOT EQUAL TO and MySQL have two inequality operator, ‘’ and ‘!=’. following MySQL queries shows the inequality conditionsmysql> Select tender_value From estimated_cost1 WHERE Name_company != 'Chd Ltd.';The above query shows inequality condition because it have != operator.mysql> Select tender_value From estimated_cost1 WHERE Name_company 'Chd Ltd.';The above query shows inequality condition because it have operator.

The binary equality operators compare their operands for strict equality or inequality. In MySQL, the equal-to-operator (=) returns 1 if both the operands have the same value otherwise returns 0. Following MySQL query show an equality condition −mysql> Select tender_value From estimated_cost WHERE id = 3;The above query shows an equality condition because the column id equates to the integer value.mysql> Select tender_value From estimated_cost1 WHERE Name_company = 'Chd Ltd.';The above query shows an equality condition because column Name_company equates to the string value.

We can fetch the MySQL SET column values as a list of integer offset with the help of the MAKE_SET() function. To make it understand, we are creating a table named ‘set_testing’ as follows −mysql> Create table set_testing( id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT, table SET('ABC', 'ABD', 'GHF') NOT NULL); Query OK, 0 rows affected (0.08 sec) mysql> Insert into set_testing (table) values('1'); Query OK, 1 row affected (0.06 sec) mysql> Insert into set_testing (table) values('2'); Query OK, 1 row affected (0.06 sec) mysql> Insert into set_testing (table) values('3'); Query OK, 1 row affected (0.02 ... Read More

As we know that WHERE clause is used to put condition/s in MySQL query and MySQL returns result set based on those conditions. Similarly when we use REPLACE() function with WHERE clause, the result set will depend upon the conditions provided. Following is an example by using data from the ‘Student’ table in which REPLACE() function replaces the records of a column ‘Name’ in which the value of column ‘Subject’ is ‘Computers’.Examplemysql> Select Name, REPLACE(Name, 'G', 'S') from student Where Subject = 'Computers'; +--------+------------------------+ | Name   | REPLACE(Name, 'G', 'S') | +--------+------------------------+ | Gaurav | Saurav       ... Read More

We can get the record(s) as a result set by providing the particular string and name of the column as arguments of FIND_IN_SET() function. We also need to use WHERE clause with FIND_IN_SET() function. To understand it, we are using the data, given as below, from table ‘student_info’:mysql> Select * from student_info; +------+---------+----------+------------+ | id   | Name    | Address  | Subject    | +------+---------+----------+------------+ | 101  | YashPal | Amritsar | History    | | 105  | Gaurav  | Jaipur   | Literature | | 125  | Raman  | Shimla    | Computers  | +------+---------+----------+------------+ 3 rows in ... Read More

In case if ‘len’ is not within the length of the rest of the string then MySQL INSERT() function will continue to remove the characters until the end of the original string.Examplemysql> Select INSERT('myteststring',3,15,'name'); +------------------------------------+ | INSERT('myteststring',3,15,'name') | +------------------------------------+ | myname                             | +------------------------------------+ 1 row in set (0.00 sec)

MySQL INSERT() function performs no insertion if the position of insertion is not within the length of the string. There are certain cases like we pass a negative or 0(zero) value or the value goes beyond the value of a total number of characters in an original string by 2 when we can say that ‘pos’ is not within the length of the string. It can be understood with the help of the following example −ExampleThe query below will perform no insertion because the ‘pos’ is not within the length of string i.e. a negative value.mysql> Select INSERT('Tutorialspoint', -1, 4, '.com'); +--------------------------------------+ ... Read More

We can use a MySQL INSERT() function to insert a substring at the specified position in a string.SyntaxINSERT(original_string, @pos, @len, new_string)Here, original_string is the string in which we want to insert a new string at the place of some specific number of characters.@pos is the position at which the insertion of the new string should start.@len is the number of characters that should delete from the original string. The starting point of the deletion of characters is the value of @pos.New_string is the string we want to insert into the original string.Examplemysql> Select INSERT('MySQL Tutorial', 7, 8, '@Tutorialspoint'); +------------------------------------------------+ | ... Read More