To add a new column to an already created table, use ALTER TABLE and ADD COLUMN. Use AUTO_INCREMENT to set auto increment custom value.Let us first create a table −mysql> create table DemoTable    -> (    -> StudentName varchar(20)    -> ); Query OK, 0 rows affected (0.63 sec)Insert ... Read More

The order is a reserved word. To still use a reserved word, you need to use backticks around the column name. Let us first create a table −mysql> create table `order`    -> (    -> StudentId int    -> ); Query OK, 0 rows affected (1.78 sec)Insert some records ... Read More

For this, you can use an aggregate function SUM() along with the condition. Let us first create a table −mysql> create table DemoTable    -> (    -> Status varchar(20)    -> ); Query OK, 0 rows affected (1.22 sec)Insert some records in the table using insert command −mysql> insert ... Read More

To find a match, use regular expressions in MySQL. Let us first create a table −mysql> create table DemoTable    -> (    -> Value varchar(60)    -> ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('8|56|78|45'); Query ... Read More

To insert records with double quotes, use a backslash (\) as in the below syntax −Syntaxinsert into yourTableName values('\"yourValue\"');Let us first create a table −mysql> create table DemoTable    -> (    -> Name varchar(20)    -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> ListOfName text    -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Carol, Sam, John, David, Bob, Mike, Robert, John, Chris, James, Jace'); ... Read More

To extract date from the string in MySQL, use SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable    -> (    -> Title text    -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John ... Read More

Use MySQL GROUP_BY to find the number of occurrences from two columns. Let us first create a table −mysql> create table DemoTable    -> (    -> Name1 varchar(20),    -> Name2 varchar(20)    -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> Date1 date,    -> Date2 date    -> ); Query OK, 0 rows affected (1.04 sec)Insert some records in the table using insert command &miuns;mysql> insert into DemoTable values('2017-01-10', '2017-12-10'); Query OK, 1 row affected ... Read More

For the current date, use CURDATE(). Also, use STR_TO_DATE() to format date and compare it with the current date as in the below syntax −Syntaxselect *from yourTableName where str_to_date(yourColumnName, 'yourFormatSpecifier')=curdate();Let’s say the current date is 27/10/2019.Let us first create a table −mysql> create table DemoTable    -> (    -> ... Read More