Let us first create a table −mysql> create table DemoTable (    Title varchar(100) ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('\"MySQL'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('MongoDB\"'); Query OK, 1 ... Read More

No, it isn’t necessary because without adding DEFAULT NULL, it gives NULL value. For example, let’s say you haven’t added DEFAULT NULL and inserted a record with no value, then the result would display the NULL value as the inserted value.Let us first create a table −mysql> create table DemoTable ... Read More

Let us first create a table −mysql> create table DemoTable (    Strength text ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John is a good programmer'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable ... Read More

Let us first create a table −mysql> create table DemoTable (    UserId int,    UserName varchar(100) ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 'Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable ... Read More

Get similar results using MySQL IN(). Let us first create a table −mysql> create table DemoTable (    ClientId int,    ClientName varchar(100),    ClientAge int ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 'Chris', 34); Query ... Read More

For this, you can use the ORDER BY CASE statement. Let us first create a table −mysql> create table DemoTable (    DueDate date ); Query OK, 0 rows affected (0.56 sec)Note − Let’s say the current date is 2019-07-22.Insert some records in the table using insert command −mysql> insert ... Read More

Let us first create a table −mysql> create table DemoTable (    id int ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.43 sec) mysql> insert into DemoTable values(7); Query OK, 1 ... Read More

Let us first create a table −mysql> create table DemoTable (    Value varchar(100) ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('€986'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('§97'); Query OK, 1 ... Read More

To select distinct values from two columns, use UNION. Let us first create a table −mysql> create table DemoTable1 (    Value1 int ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(1); Query OK, 1 row affected (0.13 ... Read More

Let us first create a table −mysql> create table DemoTable (    StudentId int,    StudentName varchar(100) ); Query OK, 0 rows affected (0.85 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(NULL, 'Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable ... Read More