Let us first create a table −mysql> create table DemoTable746 (    Number int ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable746 values(100); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable746 values(200); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable746 values(300); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable746 values(400); Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −mysql> select *from DemoTable746;This will produce the following output -+--------+ | Number | +--------+ ... Read More

To check for NULL, use the IS NULL. For empty values, you need to check with an empty string. We will now see an example.Let us first create a table −mysql> create table DemoTable691(    PlayerId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    PlayerName varchar(100),    PlayerScore int ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable691(PlayerName, PlayerScore) values('Robert', 56); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable691(PlayerName, PlayerScore) values('David', 89); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable691(PlayerName, PlayerScore) values('', 98); Query ... Read More

Let us first see a case wherein we use “create table table” while creating a table. An error will arise −mysql> create table table(    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FirstName varchar(100) );This will produce the following output i.e. error −ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'table(    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FirstName varchar(100) )' at line 1As you can see above, the word “table” is a reserved keyword, and we ... Read More

To select records that begin with a specific value, you need to use LIKE operator. Let us first create a table −mysql> create table DemoTable690(    UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    UserValue varchar(100) ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable690(UserValue) values('567890'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable690(UserValue) values('789032'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable690(UserValue) values('567342'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable690(UserValue) values('890678'); Query OK, 1 row affected (0.16 sec)Display ... Read More

This kind of errors arise when you have used incorrect syntax. Let us see an example wherein we have created a table and the same error “1054” arise.Here’s the table −mysql> create table DemoTable689(    UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    UserName varchar(100),    UserLoginDate date(100) NOT NULL );This will produce the following output i.e. an error for incorrect syntax usage −ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(100) NOT NULL )' at line 5Let us now ... Read More

To find missing value between two MySQL tables, use NOT IN. Let us first create a table −mysql> create table DemoTable1(Value int); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(1); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1 values(2); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable1 values(5); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable1 values(6); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1 values(8); Query OK, 1 row affected (0.16 sec)Display all records from ... Read More

Let us first create a table −mysql> create table DemoTable1(Name varchar(100)); Query OK, 0 rows affected (0.83 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values('John'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable1 values('Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1 values('Robert'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;This will produce the following output −+--------+ | Name | +--------+ | John | | Chris | | Robert | +--------+ 3 ... Read More

Yes, an alternative for MySQL “WHERE.. OR” is using REGEXP.Let us first create a table −mysql> create table DemoTable684(EmployeeInformation text); Query OK, 0 rows affected (0.68 sec)Insert some records in the table using insert command −mysql> insert into DemoTable684 values('John 21 Google'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable684 values('Carol 23 Amazon'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable684 values('Carol 26 Flipkart'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable684 values('David 29 Microsoft'); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −mysql> ... Read More

To select first 10 records, we can first order the records in ascending or descending order. With that, use LIMIT 10 to get only 10 records −select *from (select *from yourTableName ORDER BY yourColumnName ASC LIMIT 10)anyAliasName ORDER BY yourColumnName DESC;Let us first create a table −mysql> create table DemoTable683(Page int); Query OK, 0 rows affected (0.83 sec)Insert some records in the table using insert command −mysql> insert into DemoTable683 values(100); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable683 values(101); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable683 values(102); Query OK, 1 row affected ... Read More

Let us first create a table −mysql> create table DemoTable793(    StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    StudentName varchar(100) ); Query OK, 0 rows affected (0.81 sec)Insert some records in the table using insert command −mysql> insert into DemoTable793(StudentName) values('Adam'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable793(StudentName) values('Bob'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable793(StudentName) values(null); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable793(StudentName) values('Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable793(StudentName) values('Robert'); Query OK, 1 row affected (1.03 sec)Display all records from ... Read More