Let us first create a table −mysql> create table DemoTable (    StudentName varchar(40),    StudentMarks int ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John', 78); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable ... Read More

For this, you can use UNION along with the ORDER BY clause. Let us first create a table −mysql> create table DemoTable1 (    Amount int ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(234); Query OK, 1 ... Read More

If there are multiple MySQL keywords in a query, use backticks symbol rather than single quotes. Let us first create a table. Here, we have used two reserved keywords i.e. ‘key’ and ‘Limit’ −mysql> create table DemoTable (    `key` int NOT NULL AUTO_INCREMENT PRIMARY KEY ,    `Limit` int ... Read More

To skip records in MySQL SELECT, use OFFSET. Let us first create a table−mysql> create table DemoTable (    Name varchar(40) ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris'); Query OK, 1 row affected (0.22 sec) mysql> ... Read More

To speed up SELECT DISTINCT, you can create an index on the column or set of columns. Let us first create a table −mysql> create table DemoTable (    Name varchar(40) ); Query OK, 0 rows affected (1.13 sec)Following is the query to create an index −mysql> create index Name_Index ... Read More

Let us first create a table −mysql> create table DemoTable (    Cost int,    Quantity int ); Query OK, 0 rows affected (0.80 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(65, 2); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable ... Read More

For this, you can use the LIKE operator along with CONCAT() function. Let us first create a table −mysql> create table DemoTable (    Value text ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('MySQL'); Query OK, 1 ... Read More

To avoid displaying a certain id from a table, you need to use the operator, which is the NOT EQUAL operator. Let us first create a table −mysql> create table DemoTable7 (    StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    StudentName varchar(40) ); Query OK, 0 rows affected ... Read More

For this, use LENGTH(), since if the length is 0 that would mean the string is empty. After finding, you can set it to NULL using the SET clause in the UPDATE command. Let us first create a table −mysql> create table DemoTable (    Name varchar(50) ); Query OK, ... Read More

Let us first create a table −mysql> create table DemoTable (    Id int ); Query OK, 0 rows affected (0.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable values(101); Query OK, 1 ... Read More