To get the maximum exam date with a user-defined variable, the code is as follows −select date(max(yourColumnName )) into @yourVariableName  from yourTableName;To understand the above syntax, let us first create a table −mysql> create table DemoTable2001 (    ExamDate date ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2001 values('2019-01-10'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable2001 values('2018-12-31'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable2001 values('2018-11-18'); Query OK, 1 row affected (0.39 sec) mysql> insert into DemoTable2001 values('2019-07-25'); Query OK, 1 ... Read More

To display right single quotation marks, you need to alter the table with COLLATE='utf8_unicode_ci'.Let us first create a table −mysql> create table DemoTable2000 (    Name varchar(20) ); Query OK, 0 rows affected (0.81 sec)Here is the query to use collate −mysql> ALTER TABLE DemoTable2000 COLLATE='utf8_unicode_ci'; Query OK, 0 rows affected (0.90 sec) Records: 0  Duplicates: 0  Warnings: 0Insert some records in the table using insert command −mysql> insert into DemoTable2000 values('Chris’s Brown'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable2000 values('David’s Miller'); Query OK, 1 row affected (0.67 sec) mysql> insert into DemoTable2000 values('Robert’s Downey'); Query ... Read More

To return only the month name, you can use DATE_FORMAT() −mysql> create table DemoTable1999 (    ArrivalDate timestamp ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1999 values('2019-01-01 12:34:00'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1999 values('2019-12-31 10:04:00'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1999 values('2018-10-11 04:04:30'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select * from DemoTable1999;This will produce the following output −+---------------------+ | ArrivalDate         | +---------------------+ ... Read More

To return only a single row from duplicate rows, use DISTINCT keyword −mysql> create table DemoTable1998 (    Name varchar(20) ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1998 values('Robert'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1998 values('Chris'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1998 values('Robert'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable1998 values('David'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1998 values('Bob'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1998 ... Read More

To convert date to UNIX timestamp, use UNIX_TIMESTAMP() in MySQL −mysql> create table DemoTable1997 (    DueDate date ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1997 values('2018-10-11'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1997 values('2019-12-21'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1997 values('2017-01-31'); Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −mysql> select * from DemoTable1997;This will produce the following output −+------------+ | DueDate    | +------------+ | 2018-10-11 | | 2019-12-21 | ... Read More

Let us create a table −mysql> create table DemoTable1996 (    ShippingDate datetime,    CustomerName varchar(20) ); Query OK, 0 rows affected (0.84 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1996 values('2019-12-21 10:45:00', 'Chris'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1996 values('2019-12-21 12:10:00', 'David'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1996 values('2019-12-20 12:10:00', 'Bob'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select * from DemoTable1996;This will produce the following output −+---------------------+--------------+ | ShippingDate        | CustomerName ... Read More

Let us first create a table −mysql> create table DemoTable1994 (    ArrivalDate date ); Query OK, 0 rows affected (5.33 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1994 values('2019-12-18'); Query OK, 1 row affected (0.47 sec) mysql> insert into DemoTable1994 values('2019-12-19'); Query OK, 1 row affected (0.33 sec) mysql> insert into DemoTable1994 values('2019-12-20'); Query OK, 1 row affected (0.49 sec) mysql> insert into DemoTable1994 values('2019-12-25'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable1994 values('2018-12-20'); Query OK, 1 row affected (1.42 sec)Display all records from the table using select statement −mysql> select ... Read More

Use the if else to set custom messages for enum. Let us first create a table −mysql> create table DemoTable1992 (    ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    ClientName varchar(20),    isActive ENUM('Y', 'N') ); Query OK, 0 rows affected (0.89 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1992(ClientName, isActive) values('Chris', 'N'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1992(ClientName, isActive) values('Bob', 'N'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1992(ClientName, isActive) values('David', 'Y'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1992(ClientName, isActive) values('Carol', ... Read More

For this, you can use NOT IN() −mysql> create table DemoTable1991 (    StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    StudentName varchar(20) ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1991(StudentName) values('Chris'); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable1991(StudentName) values('Bob'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1991(StudentName) values('David'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1991(StudentName) values('Sam'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1991(StudentName) values('Mike'); Query OK, 1 row affected (0.11 sec)Display all ... Read More

To get dates that are one week ahead from today, use DATEDIFF. Let us first get the current date −mysql> select curdate(); +------------+ | curdate()  | +------------+ | 2019-12-20 | +------------+ 1 row in set (0.00 sec)We will first create a table −mysql> create table DemoTable1990    (    ShippingDate date    ); Query OK, 0 rows affected (0.99 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1990 values('2019-12-13'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1990 values('2019-12-21'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1990 values('2019-12-20'); Query OK, 1 ... Read More