To maintain the custom order of IDs, use ORDER BY CASE statement. Let us first create a table −mysql> create table DemoTable1550    -> (    -> Id int,    -> Name varchar(20)    -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1550 values(101, 'Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1550 values(110, 'Bob'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable1550 values(105, 'Carol'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1550 values(109, 'Mike'); Query OK, 1 row ... Read More

For this, you can use the INSERT INTO SELECT statement. To format the date, use the DATE_FORMAT() function. Let us first create a table −mysql> create table DemoTable    -> (    -> DateOfJoining datetime,    -> JoiningDate text    -> ); Query OK, 0 rows affected (0.79 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(DateOfJoining) values('2019-10-26 13:52:10'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(DateOfJoining) values('2018-12-31 15:20:40'); Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement−mysql> select *from DemoTable;This will produce the following output −+---------------------+-------------+ ... Read More

There is no difference between show index, show indexes and show keys. They have similar meaning.Let us first create a table −mysql> create table DemoTable1549    -> (    -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> EmployeeName varchar(20)    -> ); Query OK, 0 rows affected (0.82 sec)Following is the query to create an index −mysql> create index name_index1 on DemoTable1549(EmployeeName); Query OK, 0 rows affected (0.41 sec) Records: 0  Duplicates: 0  Warnings: 0Following is the query for SHOW INDEX −mysql> show index from DemoTable1549;This will produce the following output −+---------------+------------+-------------+--------------+--------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+ | Table         ... Read More

To fetch records from comma separated values, use MySQL FIND_IN_SET(). Let us first create a table −mysql> create table DemoTable1548    -> (    -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> StudentName varchar(20),    -> ArrayListOfMarks varchar(100)    -> ); Query OK, 0 rows affected (0.88 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1548(StudentName, ArrayListOfMarks) values('Chris', '56, 78, 90, 87'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable1548(StudentName, ArrayListOfMarks) values('Bob', '90, 78, 65'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1548(StudentName, ArrayListOfMarks) values('David', '91, 34, 56, ... Read More

For this, you need to compare and find the difference between the current date and the result date of students. This can be done with AND operator along with DATEDIFF().Let us first create a table −mysql> create table DemoTable1547    -> (    -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> StudentName varchar(20),    -> StudentMarks int,    -> StudentResultDeclareDate datetime    -> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1547(StudentName, StudentMarks, StudentResultDeclareDate) values('Chris', 56, '2019-10-13 13:00:00')    -> ; Query OK, 1 row affected (0.16 ... Read More

For this, you can use the CASE statement. To sort, use the ORDER BY clause. Let us first create a table −mysql> create table DemoTable    -> (    -> ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> ClientName varchar(20)    -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command. Some records have certain last string like -D, etc −mysql> insert into DemoTable(ClientName) values('Mike'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(ClientName) values('John'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable(ClientName) values('John-D'); Query OK, 1 ... Read More

Let us first create a table −mysql> create table DemoTable1546    -> (    -> Number varchar(20)    -> ); Query OK, 0 rows affected (0.99 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1546 values('145 78 90'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1546 values('89 789 564 903'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1546 values('1345 7894 866 653534'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select * from DemoTable1546;This will produce the following output −+----------------------+ | Number ... Read More

To understand, let us create a stored procedure. Here, we have 2 select statements in the stored procedure −mysql> DELIMITER // mysql> CREATE PROCEDURE select_statement()    -> BEGIN    ->    SELECT "HI" AS `FIRST VALUE`;    ->    SELECT "HELLO" AS `SECOND VALUE`;    -> END    -> // Query OK, 0 rows affected (0.09 sec) mysql> DELIMITER ;Call the stored procedure using CALL command −mysql> CALL select_statement();This will produce the following output −+-------------+ | FIRST VALUE | +-------------+ | HI          | +-------------+ 1 row in set (0.00 sec) +--------------+ | SECOND VALUE | +--------------+ | HELLO        | +--------------+ 1 row in set (0.01 sec) Query OK, 0 rows affected (0.01 sec)

Let us first create a table −mysql> create table DemoTable    -> (    -> Name text    -> ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John [John] Smith'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable values('[Carol] Carol Taylor'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('David [Miller] Miller'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output−+-----------------------+ | Name         ... Read More

For conditions, use CASE statement in MySQL. Let us first create a table −mysql> create table DemoTable1545    -> (    -> Id int,    -> FirstName varchar(20)    -> ); Query OK, 0 rows affected (1.65 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1545 values(1, 'John'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1545 values(2, 'Chris'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1545 values(3, 'Bob'); Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement −mysql> select * from DemoTable1545;This will produce ... Read More