MySQL Articles - Page 132 of 439

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 row affected (0.09 sec) mysql> insert into DemoTable values('\"Java\"'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('\"C\"'); 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 −+-----------+ | Title     ... 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 (    FirstName varchar(100) ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(); Query ... 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 values('Chris is a good player in cricket'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Bob is good in algorithm'); Query OK, 1 row affected (0.42 sec)Display all records from the table using select statement −mysql> select *from DemoTableThis will produce the following output −+-----------------------------------+ | Strength ... 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 values(101, 'Robert'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(102, 'David'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(103, 'Mike'); Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the ... 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 OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(101, 'Robert', 31); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(103, 'David', 33); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(104, 'Mike', 45); Query OK, 1 row affected (0.17 sec) mysql> insert ... 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 into DemoTable values('2019-03-10'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('2019-08-25'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('2019-06-01'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('2019-12-31'); Query OK, 1 row affected (0.17 sec)Display all records from the ... 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 row affected (0.19 sec) mysql> insert into DemoTable values(8); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(6); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(9); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(11); Query OK, 1 row affected ... 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 row affected (0.15 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------+ | Value | +--------+ | €986 | | §97 +--------+ 2 rows in set (0.00 sec)Following is the query to remove unconvertable characters to ASCII ... 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 sec) mysql> insert into DemoTable1 values(2); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1 values(3); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1 values(4); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;This will ... 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 values(NULL, 'Robert'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(101, 'David'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(102, 'Mike'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(103, 'Sam'); Query OK, 1 row affected (0.18 sec)Display all records ... Read More