You need to use GROUP BY clause. Let us first create a −mysql> create table DemoTable1443    -> (    -> StudentId int,    -> StudentScore int    -> ); Query OK, 0 rows affected (0.42 sec)Insert some records in the table using insert −mysql> insert into DemoTable1443 values(100, 78); ... Read More

Let us first create a −mysql> create table DemoTable1442    -> (    -> DueTime time    -> ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert −mysql> insert into DemoTable1442 values('00:08:00'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1442 values('00:04:00'); ... Read More

MySQL will implicitly convert the column into a number. Following is the syntax −select * from yourTableName  order by yourColumnName*1;Let us first create a −mysql> create table DemoTable1441    -> (    -> Id varchar(30)    -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table ... Read More

Use DEFAULT keyword in MySQL to set default value to NULL. Let us first create a −mysql> create table DemoTable1440    -> (    -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> StudentName varchar(20) DEFAULT NULL,    -> StudentAge int DEFAULT NULL    -> ); Query OK, 0 ... Read More

For specific value, use FIND_IN_SET(). Let us first create a −mysql> create table DemoTable1439    -> (    -> CountryId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> CountryCode varchar(20)    -> ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert −mysql> insert into ... Read More

For this, you can use JSON data type from MySQL. Let us first create a −mysql> create table DemoTable1438    -> (    -> EmployeeDetails json    -> ); Query OK, 0 rows affected (5.97 sec)Insert some records in the table using insert −mysql> insert into DemoTable1438 values('[{"EmployeeId":"EMP-101", "EmployeeName":"Chris"}, {"EmployeeId":"EMP-102", ... Read More

For index, you can use KEY(). Let us first create a −mysql> create table DemoTable1437    -> (    -> StudentId int,    -> StudentName varchar(20),    -> StudentMarks int,    -> StudentAge int    -> ,    -> KEY(StudentId, StudentMarks, StudentAge)    -> ); Query OK, 0 rows affected ... Read More

Let us first create a −mysql> create table DemoTable1436    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Name varchar(20)    -> ); Query OK, 0 rows affected (1.06 sec)Insert some records in the table using insert −mysql> insert into DemoTable1436(Name) values('Chris'); Query OK, 1 ... Read More

Let us first see the syntax, wherein we are calling multiple procedures from a stored procedure −DELIMITER // CREATE PROCEDURE yourProcedureName() BEGIN    CALL yourStoredProcedureName1();    CALL yourStoredProcedureName2();    .    .    N END // DELIMITER //Let us implement the above syntax to call multiple stored procedures.Following is the ... Read More

To display dates like “01 August 2019”, use ORDER BY STR_TO_DATE(). Let us first create a −mysql> create table DemoTable1435    -> (    -> DueDate varchar(60)    -> ); Query OK, 0 rows affected (1.08 sec)Insert some records in the table using insert −mysql> insert into DemoTable1435 values('01 August ... Read More