To execute multiple select queries in MySQL, use the concept of DELIMITER. Let us first create a table −mysql> create table DemoTable1 (    Title text )ENGINE=MyISAM; Query OK, 0 rows affected (0.30 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values('The database MySQL is less popular than MongoDB') ; Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1 values('Java language uses MySQL database'); Query OK, 1 row affected (0.05 sec) mysql> insert into DemoTable1 values('Node.js uses the MongoDB') ; Query OK, 1 row affected (0.05 sec)Display all records from the table using ... Read More

The error is in the syntax of VALUE().Use VALUES() instead of VALUE(). The correct syntax of the insert query is as follows −INSERT INTO yourTableName VALUES(yourValue1, yourValue2, .......N);Let us first create a table −mysql> create table DemoTable (    StudentId int,    StudentName varchar(40),    StudentAge int ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> INSERT INTO DemoTable VALUES(1001, 'Tom', 20); Query OK, 1 row affected (0.11 sec) mysql> INSERT INTO DemoTable VALUES(1002, 'Mike', 21); Query OK, 1 row affected (0.13 sec) mysql> INSERT INTO DemoTable VALUES(1003, 'Sam', 19); Query OK, ... Read More

Let us first create a table −mysql> create table DemoTable1 (    EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    EmployeeName varchar(50) ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1(EmployeeName) values('Tom'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable1(EmployeeName) values('Mike'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1(EmployeeName) values('Emma'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1(EmployeeName) values('Sam'); Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement::mysql> select *from DemoTable1;This will produce the ... Read More

If you want only the string values, then use the below syntax −select *from yourTableName where yourColumnName NOT regexp '^[0-9]+$';If you want only the digit, then use the below syntax −select *from yourTableName where yourColumnName regexp '^[0-9]+$';Let us first create a table −mysql> create table DemoTable(    Id varchar(100) ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('1000'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Carol_Smith'); Query OK, 1 row affected (0.15 ... Read More

Let us first create a table −mysql> create temporary table DemoTable (    SerialNumber int ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command. Here, we are inserting multiple values in a temporary table −mysql> insert into DemoTable values(1),(2),(3),(4),(5),(6),(7),(8); Query OK, 8 rows affected (0.00 sec) Records: 8 Duplicates: 0 Warnings: 0Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------------+ | SerialNumber | +--------------+ |            1 | |            2 | |            3 | |            4 | |            5 | |            6 | | 7 | | 8 | +--------------+ 8 rows in set (0.00 sec)

For this, you can use GROUP_CONCAT() along with DISTINCT. Let us first create a table −mysql> create table DemoTable (    Id int,    Subject varchar(40) ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 'MySQL'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values(100, 'MongoDB'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(100, 'Java'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(100, 'MongoDB'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(101, 'MySQL'); ... Read More

For this, you can filter records on the basis of LIKE. Let us first create a table −mysql> create table DemoTable (    Name varchar(50) ); Query OK, 0 rows affected (0.50 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John Smith'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Adam Smith'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Carol'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('David Miller'); Query OK, 1 ... Read More

For this, compare the date records with the current date using the CURDATE() method. Let us first create a table −mysql> create table DemoTable (    RegistrationLastDate datetime ); Query OK, 0 rows affected (0.61 sec)Let’s say the current date is −2019-09-03Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-08-01'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('2019-09-03 9:50:56'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('2019-09-03'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('2019-09-02'); Query OK, 1 row affected (0.18 sec) mysql> ... Read More

The MySQL converts NVARCHAR() to VARCHAR(). NVARCHAR stands for National Varchar in MySQL. Let us first create a table with one of the columns “StudentName” as NVARCHAR −mysql> create table DemoTable (    StudentName NVARCHAR(40),    StudentCountryName VARCHAR(50) ); Query OK, 0 rows affected, 1 warning (0.49 sec)Let us check the description of the table −mysql> desc DemoTable;This will produce the following output. As you can see below, the StudentName column with NVARCHAR type is automatically converted to VARCHAR in MySQL −+--------------------+-------------+------+-----+---------+-------+ | Field | Type ... Read More

To update all the values in a column to John1, John2, etc.; you need to set incremental values 1, 2, 3, etc. and concatenate them to the records. Let us first create a table −mysql> create table DemoTable (    StudentId varchar(80) ); Query OK, 0 rows affected (0.50 sec)Insert some records in the table using insert command. Here, for our example, we have set similar names −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values('John'); Query OK, 1 row ... Read More