Let us first create a table −mysql> create table DemoTable (    StudentId varchar(40) ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('10'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(20); Query OK, 1 ... Read More

The MySQL converts NVARCHAR() to VARCHAR(). NVARCHAR stands for National Varchar in MySQL. Let us first create a table with one of the columns “StudentName” as NVARCHAR −mysql> create table DemoTable (    StudentName NVARCHAR(40),    StudentCountryName VARCHAR(50) ); Query OK, 0 rows affected, 1 warning (0.49 sec)Let us check ... Read More

To update all the values in a column to John1, John2, etc.; you need to set incremental values 1, 2, 3, etc. and concatenate them to the records. Let us first create a table −mysql> create table DemoTable (    StudentId varchar(80) ); Query OK, 0 rows affected (0.50 sec)Insert ... Read More

For this, you can use LIKE operator. Let us first create a table −mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Name varchar(40),    BornMonth varchar(40) ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert ... Read More

The UPDATE command is used in MySQL to update records. With it, the SET command is used to set new values. Let us first create a table −mysql> create table DemoTable (    EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    EmployeeName varchar(50),    EmployeeSalary int ); Query OK, 0 ... Read More

In MySQL, SERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE. So, do not use NOT NULL after SERIAL, since it already includes NOT NULL as part of its definition.Let us see an example and create a table. Here, we have a column with the name “serial” −mysql> ... Read More

To get the nth highest value in a column, you can use LIMIT OFFSET. Here, OFFSET is used to skip the values. Let us first create a table −mysql> create table DemoTable (    Value int ) ; Query OK, 0 rows affected (0.49 sec)Insert some records in the table ... Read More

To delete, use MySQL DELETE. However, to get records older than 14 days, subtract the current date with date interval of 14 days. The syntax for the same is shown below −delete from yourTableName where yourColumnName< (curdate() - interval 14 day);Let us first create a table −mysql> create table DemoTable ... Read More

Create a table inside the stored procedure and use INSERT as well −mysql> DELIMITER // mysql> CREATE PROCEDURE create_TableDemo(id int, name varchar(100), age int)    BEGIN    CREATE TABLE DemoTable    (       ClientId int NOT NULL,       ClientName varchar(30),       ClientAge int,   ... Read More

To get the last date i.e. the latest, use aggregate function MAX() with a subquery. Let us first create a table −mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    ExpiryDate date ); Query OK, 0 rows affected (1.40 sec)Insert some records in the table ... Read More