Database Articles - Page 228 of 546

Let us first see an example and create a table −mysql> create table DemoTable (    StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    StudentName varchar(40),    StudentAge int,    StudentMarks int ); Query OK, 0 rows affected (0.76 sec)Following is the query to know the database structure −mysql> show create table DemoTable;This will produce the following output −+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table         | Create Table                                                                 ... Read More

To exclude records, use MySQL NOT IN(). Let us first create a table −mysql> create table DemoTable (    Id int ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(2); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(3); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(4); Query OK, 1 row affected (0.41 sec) mysql> insert into DemoTable values(5); Query OK, 1 row affected (0.09 sec) mysql> insert into ... Read More

Let us first create a table −mysql> create table DemoTable (    Name varchar(40),    Position int ); Query OK, 0 rows affected (1.17 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', 90); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('David', 67); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Bob', 55); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('Sam', 40); 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 ... Read More

To find a match from records, use MySQL IN(). Let us first create a table −mysql> create table DemoTable (    Id int,    FirstName varchar(20),    Gender ENUM('Male', 'Female') ); Query OK, 0 rows affected (1.73 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1, 'Chris', 'Male'); Query OK, 1 row affected (0.47 sec) mysql> insert into DemoTable values(10, 'Emma', 'Female'); Query OK, 1 row affected (1.88 sec) mysql> insert into DemoTable values(9, 'Emma', 'Male'); Query OK, 1 row affected (0.70 sec) mysql> insert into DemoTable values(11, 'Isabella', 'Female'); Query OK, 1 row affected ... Read More

For this, use REGEXP. For example, characters J, A, V and A. Let us first create a table −mysql> create table DemoTable (    Value varchar(50) ); Query OK, 0 rows affected (3.92 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('XYSJGHAKLMVDFFSA'); Query OK, 1 row affected (0.67 sec) mysql> insert into DemoTable values('PQRSTJAVAL'); Query OK, 1 row affected (0.58 sec) mysql> insert into DemoTable values('SJATUVAK'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('JSTUVA'); Query OK, 1 row affected (0.32 sec)Display all records from the table using select statement −mysql> select ... Read More

For this, you can use COUNT() along with CASE STATEMENT. Let us first create a table −mysql> create table DemoTable (    Score int ); Query OK, 0 rows affected (0.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(40); Query OK, 1 row affected (0.77 sec) mysql> insert into DemoTable values(48); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(59); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(33); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(38); Query OK, 1 row affected (0.09 sec) ... Read More

For this, use STR_TO_DATE(). Let us first create a table −mysql> create table DemoTable (    DueDate varchar(60) ) ; Query OK, 0 rows affected (0.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('12-AUG-2016'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('14-AUG-2018'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('24-AUG-2012'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('14-AUG-2012'); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output ... Read More

Yes, you can search for particular numbers using the MySQL FIND_IN_SET(). Let us first create a table −mysql> create table DemoTable (    ListOfNumbers varchar(100) ); Query OK, 0 rows affected (1.24 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('784, 746, 894, 344'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('456, 322, 333, 456'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('654, 785, 678, 456'); Query OK, 1 row affected (0.47 sec) mysql> insert into DemoTable values('123, 676, 847, 785'); Query OK, 1 row affected (0.34 ... Read More

For this, use GROUP_CONCAT(). For only 1 values, work with MySQL WHERE clause. Let us first create a table −mysql> create table DemoTable (    PlayerName varchar(40),    PlayerStatus tinyint(1) ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', 1); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('David', 0); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Sam', 1); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Carol', 1); Query OK, 1 row affected (0.12 sec) mysql> insert ... Read More

The easiest way to achieve this is by using the MySQL SUBSTRING_INDEX() function. Let us first create a table −mysql> create table DemoTable (    ZipCode varchar(50) ); Query OK, 0 rows affected (2.02 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('52533-909'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values('12345-674'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values('89893-890'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values('AAAAA-783'); Query OK, 1 row affected (0.25 sec)Display all records from the table using select statement −mysql> ... Read More