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

For subtracting dates, use MySQL DATE_SUB(). Let us first create a −mysql> create table DemoTable1434    -> (    -> ArrivalDatetime datetime    -> ); Query OK, 0 rows affected (3.14 sec)Insert some records in the table using insert −mysql> insert into DemoTable1434 values('2019-09-30 21:10:00'); Query OK, 1 row affected ... Read More

For this, use CONCAT_WS() in MySQL. Let us first create a −mysql> create table DemoTable1433    -> (    -> ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> ClientFirstName varchar(20),    -> ClientLastName varchar(20)    -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table ... Read More

Let us first create a −mysql> create table DemoTable1431    -> (    -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> EmployeeName varchar(20),    -> EmployeeCountryName varchar(20)    -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert −mysql> insert into DemoTable1431(EmployeeName, ... Read More