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To ORDER BY grouped fields, use ORDER BY CASE along with IN(). CASE evaluates different conditions whereas ORDER BY sort values in ascending or descending order. The MySQL IN() is used to find a match.Let us first create a table −mysql> create table DemoTable ( Value varchar(40) ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('100&101'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('Sam'); Query OK, 1 row affected (0.09 sec) ... Read More
Use SELECT 1 for this as in the below syntax −select 1 from yourTableName where yourColumnName=yourValue;If the above returns 1, that means value exists in the MySQL database. 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 ); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentName, StudentAge) values('Chris', 21); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(StudentName, StudentAge) values('David', 20); Query OK, 1 row affected (0.16 ... Read More
Let us first create a table −mysql> create table DemoTable ( FirstName varchar(20) ); Query OK, 0 rows affected (1.15 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(NULL); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Adam'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(NULL); Query OK, 1 row affected (0.09 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+-----------+ | FirstName | +-----------+ ... Read More
Let us first create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(40), StudentMathMarks int, StudentMySQLMarks int, status ENUM('ACTIVE', 'INACTIVE') ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentName, StudentMathMarks, StudentMySQLMarks, status) values('Chris', 45, 67, 'active'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(StudentName, StudentMathMarks, StudentMySQLMarks, status) values('Bob', 89, 78, 'inactive'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(StudentName, StudentMathMarks, StudentMySQLMarks, status) values('David', 56, 68, 'active'); Query OK, 1 row affected ... Read More
The only difference between BIGINT and BIGINT(20) is for displaying width. The 20 can be used for displaying width.Let us see an example and create a table. Here, we have set BIGINT(20) −mysql> create table DemoTable ( Number bigint(20) zerofill ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values(12); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(123); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(1234); Query OK, ... Read More
Let us first create a table −mysql> create table DemoTable ( Name varchar(40) ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Sam'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Mike'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('Ethan'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Johnson'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Bob'); Query OK, 1 row affected ... Read More
For this, use LEFT() method. For manipulation, we have used the LOCATE() and the REVERSE() method.Let us first create a table −mysql> create table DemoTable ( Title text ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('$/This$is[MySQL]$/MySQL[FirstClass]$MySQL[SecondClass]'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('$/This$is[Java]$/Java[FirstClass]$Java[SecondClass]'); Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------------------------------------------------------+ | Title ... Read More
For such string manipulations, you need to use MySQL SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable ( SystemIpAddress text ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('192.168.130.67'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('192.168.130.87'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('192.168.131.47'); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable values('192.168.134.50'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('192.168.131.12'); Query OK, 1 row affected (0.21 sec)Display ... Read More
No, there’s no need to insert auto_increment column values, since it begins from 1 and inserts on its own. This is because we have set it as auto increment. Let us first create a table −mysql> create table DemoTable ( EmployeeId int NOT NULL AUTO_INCREMENT, EmployeeName varchar(30), EmployeeSalary int, PRIMARY KEY(EmployeeId) ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(EmployeeName, EmployeeSalary) values('Chris', 56789); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(EmployeeName, EmployeeSalary) values('David', 78909); Query OK, 1 row affected (0.14 sec) mysql> ... Read More
Let us first create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, Score int ); Query OK, 0 rows affected (0.45 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Score) values(56); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable(Score) values(78); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(Score) values(34); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(Score) values(55); Query OK, 1 row affected (0.37 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce ... Read More