- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Found 4219 Articles for MySQLi
![Chandu yadav](https://www.tutorialspoint.com/assets/profiles/22330/profile/60_142811-1519038104.jpg)
285 Views
To concatenate fields in MySQL, you can use GROUP_CONCAT() along with GROUP BY. Let us first create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(30), StudentScore int ); Query OK, 0 rows affected (0.51 sec)Insert records in the table using insert command −mysql> insert into DemoTable( StudentName, StudentScore) values('Bob', 80); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable( StudentName, StudentScore) values('Bob', 80); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable( StudentName, StudentScore) values('Chris', 90); Query OK, 1 row affected (0.13 sec) ... Read More
![Ankith Reddy](https://www.tutorialspoint.com/assets/profiles/22328/profile/60_142162-1519038074.jpg)
682 Views
You can use RIGHT() function from MySQL to get the last 12 digits from a string. Let us first create a table −mysql> create table DemoTable ( Number varchar(200) ); Query OK, 0 rows affected (0.59 sec)Insert records in the table using insert command −mysql> insert into DemoTable values('7437647847847474374747464647484949959958484'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('9990000399494959697080800007007070808080808'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('1211111212344554444443333345555554433333333333333'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select * from DemoTable;This will produce the following ... Read More
![George John](https://www.tutorialspoint.com/assets/profiles/13511/profile/60_58410-1512537824.png)
4K+ Views
First, you need to open the command prompt. You can open using shortcut windows+R key.The screenshot is as follows −Now type CMD and press OK button −Now the following command prompt would be visible −Now reach the MySQL bin directory. The screenshot is as follows −Following is the query to run MySQL in the command line to create a database −Now you can check the database is created or not using SHOW DATABASES command −mysql> SHOW DATABASES;This will produce the following output −+---------------------------+ | Database | +---------------------------+ | bothinnodbandmyisam ... Read More
![Arjun Thakur](https://www.tutorialspoint.com/assets/profiles/13574/profile/60_74441-1560315595.jpg)
342 Views
You can use DISTINCT along with SUBSTRING_INDEX() to extract the filename extensions. Let us first create a table−mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, FileName text ); Query OK, 0 rows affected (0.75 sec)Insert records in the table using insert command −mysql> insert into DemoTable(FileName) values('AddTwoValue.java'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(FileName) values('Image1.png'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(FileName) values('MultiplicationOfTwoNumbers.java'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(FileName) values('Palindrome.c'); Query OK, 1 row affected (0.16 sec) mysql> insert ... Read More
![Chandu yadav](https://www.tutorialspoint.com/assets/profiles/22330/profile/60_142811-1519038104.jpg)
733 Views
Let us first create a table −mysql> create table DemoTable ( Number float ); Query OK, 0 rows affected (0.47 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(1000); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(1); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable values(390); Query OK, 1 row affected (0.09 sec)Display all records from the table using select statement −mysql> ... Read More
![Arjun Thakur](https://www.tutorialspoint.com/assets/profiles/13574/profile/60_74441-1560315595.jpg)
215 Views
Yes, we can use all of them in a single query. Let us first create a table −mysql> create table DemoTable ( StudentId int, StudentFirstName varchar(20), StudentLastName varchar(20), StudentAge int ); Query OK, 0 rows affected (0.53 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(100, 'John', 'Smith', 23); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(101, 'Carol', 'Taylor', 24); Query OK, 1 row affected (0.62 sec) mysql> insert into DemoTable values(103, 'John', 'Doe', 22); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable ... Read More
![George John](https://www.tutorialspoint.com/assets/profiles/13511/profile/60_58410-1512537824.png)
2K+ Views
To update column with random value, you can use the below syntax−update yourTableName set yourColumnName =round(1+rand()*100);The above syntax will generate a value between 1 to 100. Let us see an example and create a table−mysql> create table DemoTable ( Number int ); Query OK, 0 rows affected (0.46 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(80); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(100000); ... Read More
![Chandu yadav](https://www.tutorialspoint.com/assets/profiles/22330/profile/60_142811-1519038104.jpg)
1K+ Views
You can use FORMAT() from MySQL to convert numbers to millions and billions format. Let us first create a table−mysql> create table DemoTable ( Value BIGINT ); Query OK, 0 rows affected (0.74 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(78000000000); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(10000000000); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(90000000000); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(450600000000); Query OK, 1 row affected (0.41 sec)Display all records from the table using select statement ... Read More
![George John](https://www.tutorialspoint.com/assets/profiles/13511/profile/60_58410-1512537824.png)
3K+ Views
To get the total number of rows in a MySQL database, you can use aggregate function SUM() along with inbuilt column TABLE_ROWS from INFORMATION_SCHEMA.TABLES.The syntax is as follows−SELECT SUM(TABLE_ROWS) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = database();Let’s say we are using the database with the name ‘sample’.Now we will get the total number of rows in a MySQL database−mysql> SELECT SUM(TABLE_ROWS) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = database();This will produce the following output−+-----------------+ | SUM(TABLE_ROWS) | +-----------------+ | 2043 | +-----------------+ 1 row in set (22.11 sec)
![Arjun Thakur](https://www.tutorialspoint.com/assets/profiles/13574/profile/60_74441-1560315595.jpg)
376 Views
You can exclude a specific record in SQL using not equal to operator(!=). Let us first create a table−mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, ClientName varchar(20), ClientCountryName varchar(10) ); Query OK, 0 rows affected (0.64 sec)Insert records in the table using insert command −mysql> insert into DemoTable(ClientName, ClientCountryName) values('John', 'US'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable(ClientName, ClientCountryName) values('David', 'AUS'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable(ClientName, ClientCountryName) values('Mike', 'UK'); Query OK, 1 row affected (0.14 sec)Display all records from the ... Read More