Let us first create a table −mysql> create table DemoTable1957    (    EmployeeId int,    EmployeeName varchar(20),    EmployeeSalary int    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1957 values(1, 'Chris', 240000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1957 values(2, 'Bob', 120000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1957 values(3, 'David', 180000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1957 values(4, 'Mike', 650000); Query OK, 1 row affected (0.00 sec)Display all records from the table using ... Read More

Let us first get the current date −mysql> select curdate();This will produce the following output −+------------+ | curdate()  | +------------+ | 2019-12-15 | +------------+ 1 row in set (0.00 sec)Let us first create a table −mysql> create table DemoTable1956    (    ProductId int,    ProductName varchar(20),    CustomerName varchar(20),    ShippingDate date    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1956 values(101, 'Product-1', 'Sam', '2019-10-11'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1956 values(102, 'Product-2', 'Carol', '2018-12-01'); Query OK, 1 row affected (0.00 sec) ... Read More

Let us first create a table −mysql> create table DemoTable1955    (    UserId int NOT NULL AUTO_INCREMENT    ,    PRIMARY KEY(UserId)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec)Display ... Read More

To fetch day name, use DAYNAME() function in MySQL. Let us first create a table −mysql> create table DemoTable1954    (    ShippingDate date    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1954 values('2019-12-15'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1954 values('2018-04-11'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1954 values('2019-01-31'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1954 values('2016-10-01'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * ... Read More

Let us first create a table −mysql> create table DemoTable1953    (    StudentName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1953 values('Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1953 values(NULL); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1953 values('David'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1953 values(NULL); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1953;This will produce the following output −+-------------+ | ... Read More

For this, use CASE statement. Let us first create a table −mysql> create table DemoTable1952    (    Marks int    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1952 values(35); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1952 values(65); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1952 values(55); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1952 values(39); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1952;This will produce ... Read More

To split float value in two columns, the first column will have a value before decimal. The second column will have a value after decimal. For this, you can use SUBSTRING_INDEX() along with CAST(). Let us first create a table −mysql> create table DemoTable1951    (    Value1 varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1951 values('100.50'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1951 values('70.90'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1951 values('1000.55'); Query OK, 1 row affected ... Read More

Let us create a table −mysql> create table DemoTable1950    (    Amount float    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1950 values(45.60); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1950 values(101.78); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1950 values(75.90); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1950 values(89.45); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1950;This will produce the following output −+--------+ | Amount ... Read More

To set NOT NULL attribute to an existing column, use ALTER TABLE command. Let us first create a table −mysql> create table DemoTable1949    (    UserId int,    UserName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Here is the query to set NOT NULL attribute to an existing column −mysql> alter table DemoTable1949 modify UserName varchar(20) not null; Query OK, 0 rows affected (0.00 sec) Records: 0  Duplicates: 0  Warnings: 0Let us check the description of table −mysql> desc DemoTable1949;This will produce the following output −+----------+-------------+------+-----+---------+-------+ | Field    | Type        | Null | ... Read More

To sort only numbers from alphanumeric string, use ORDER BY RIGHT(). Let us first create a table −mysql> create table DemoTable1948    (    StudentCode varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1948 values('121John_567'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1948 values('Adam_101'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1948 values('Bob_563'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1948 values('Sam_346'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> ... Read More