AmitDiwan has Published 10744 Articles

Copy values of one column to another using INSERT and SELECT in a single MySQL query

AmitDiwan

AmitDiwan

Updated on 25-Sep-2019 06:24:27

820 Views

Let us first create a table −mysql> create table DemoTable1 (    Name varchar(100),    Gender ENUM('MALE', 'FEMALE') ); Query OK, 0 rows affected (0.50 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values('Chris', 'Male'); Query OK, 1 row affected (0.17 sec) mysql> insert into ... Read More

How to implement HAVING LENGTH(field) in MySQL?

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 14:14:14

133 Views

Let us first create a table −mysql> create table DemoTable (    Title text ); Query OK, 0 rows affected (0.39 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Introduction to MySQL'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('Introduction to ... Read More

Set options while creating a MySQL table. Display the same options as well

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 14:10:19

205 Views

To display, use DESC command or information_schema.columns. Let us first create a table and set options −mysql> create table DemoTable (    Color SET('RED', 'GREEN', 'BLUE', 'YELLOW') ); Query OK, 0 rows affected (0.47 sec)Case 1Here is the query to get the list of available options for SET using the ... Read More

Inserting random numbers into a table in MySQL?

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 14:08:08

934 Views

To insert random numbers, use RAND() function from MySQL. Let us first create a table −mysql> create table DemoTable (    Value int ); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.15 ... Read More

Delete a record with tablename.columnname= value in MySQL

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 14:04:14

136 Views

To delete a record in the required way, the syntax is as follows −delete from yourTableName where yourTableName .yourColumnName=yourValue;Let us first create a table −mysql> create table DemoTable (    StudentName varchar(100),    StudentAge int ); Query OK, 0 rows affected (0.81 sec)Insert some records in the table using insert ... Read More

Perform MySQL UPDATE on the basis of DATE value in another column

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 14:00:41

214 Views

Let us first create a table −mysql> create table DemoTable(    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Name varchar(100),    AdmissionDate date ); Query OK, 0 rows affected (0.42 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, AdmissionDate) values('Chris', '2019-11-21'); Query OK, 1 ... Read More

Selecting all the users with maximum age values using a MySQL subquery?

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 13:54:18

365 Views

Let us first create a table −mysql> create table DemoTable (    Name varchar(100),    Age int ); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', 23); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable ... Read More

Counting the total and true condition values in a MySQL table?

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 13:47:06

121 Views

For this, you can use COUNT(). Let us first create a table −mysql> create table DemoTable (    Value int ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.14 sec) mysql> insert ... Read More

How to remove duplicate values from a MySQL table using LEFT JOIN?

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 13:43:38

590 Views

Let us first create a table −mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FirstName varchar(100) ); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(FirstName) values('Chris'); Query OK, 1 row affected (0.18 sec) ... Read More

How to concatenate strings from different columns and an additional string using a MySQL query?

AmitDiwan

AmitDiwan

Updated on 24-Sep-2019 13:41:30

126 Views

Let us first create a table −mysql> create table DemoTable (    FirstName varchar(100),    LastName varchar(100) ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', 'Brown'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable ... Read More

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