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Found 4378 Articles for MySQL
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
3K+ Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
115 Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
56 Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
831 Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
678 Views
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)
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
48 Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
238 Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
107 Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
3K+ Views
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
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
182 Views
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