- 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 6702 Articles for Database
93 Views
For such string manipulations, you need to use MySQL SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable ( SystemIpAddress text ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('192.168.130.67'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('192.168.130.87'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('192.168.131.47'); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable values('192.168.134.50'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('192.168.131.12'); Query OK, 1 row affected (0.21 sec)Display ... Read More
97 Views
No, there’s no need to insert auto_increment column values, since it begins from 1 and inserts on its own. This is because we have set it as auto increment. Let us first create a table −mysql> create table DemoTable ( EmployeeId int NOT NULL AUTO_INCREMENT, EmployeeName varchar(30), EmployeeSalary int, PRIMARY KEY(EmployeeId) ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(EmployeeName, EmployeeSalary) values('Chris', 56789); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(EmployeeName, EmployeeSalary) values('David', 78909); Query OK, 1 row affected (0.14 sec) mysql> ... Read More
319 Views
Let us first create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, Score int ); Query OK, 0 rows affected (0.45 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Score) values(56); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable(Score) values(78); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(Score) values(34); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(Score) values(55); Query OK, 1 row affected (0.37 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce ... Read More
342 Views
For this, use FLOOR() function. Here, we will be fetching records like 12.00, 35.00, etc. from a list with records like 5.23, 8.76, 12.00, 22.68, etc. Let us first create a table −mysql> create table DemoTable ( Value DECIMAL(4, 2) ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(54.20); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(55.0); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable values(7.8); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(9.0); Query OK, ... Read More
1K+ Views
Let us first create a table −mysql> create table DemoTable ( Marks int ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(88); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(65); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(98); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(45); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(67); Query OK, 1 row affected (0.33 sec)Display all records from the table using select statement −mysql> select ... Read More
391 Views
Use DELETE for this. Let us first create a table −mysql> create table DemoTable ( Name varchar(40), Score1 int , Score2 int ); Query OK, 0 rows affected (2.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John', 56, 76); Query OK, 1 row affected (0.66 sec) mysql> insert into DemoTable values('Chris', 77, 77); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('David', 89, 98); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output ... Read More
148 Views
Let’s say the current date is 2019-09-06. For our example, we will first create a table −mysql> create table DemoTable ( AdmissionDate date ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-01-08'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('2018-09-06'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('2016-10-26'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+---------------+ | AdmissionDate | +---------------+ | 2019-01-08 ... Read More
698 Views
Let us first create a table −mysql> create table DemoTable ( Code varchar(100) ); Query OK, 0 rows affected (0.50 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('8565-9848-7474'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('9994-6464-8737'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('6574-9090-7643'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+----------------+ | Code | +----------------+ | 8565-9848-7474 | | 9994-6464-8737 | | ... Read More
479 Views
To convert, use JSON.stringify(). Following is the code to convert MySQL DATETIME value to JSON format in JavaScript − var mySQLDateTime = new Date("Fri Sep 06 2019 22 −54 −48 "); var yearValue = mySQLDateTime.getFullYear(); var dateValue = mySQLDateTime.getDate(); var monthValue=mySQLDateTime.getMonth(); var hour=mySQLDateTime.getHours(); var minutes=mySQLDateTime.getMinutes(); var second=mySQLDateTime.getSeconds(); jsonObject={"year" −yearValue,"month" :monthValue,"DateValue" :dateValue,"Hour" :hour ,"Minutes" :minutes,"Second" :second}; var dateJsonObject = JSON.stringify(jsonObject); document.write(dateJsonObject); The screenshot of the code is as follows −This will produce the following output −{"year" :2019,"month" :8,"DateValue" :6,"Hour" :22,"Minutes" :54,"Second" :48}The snapshot of the output is as follows −
1K+ Views
For specific month, use MONTH() and for year, use YEAR() method. Let us first create a table −mysql> create table DemoTable ( StudentName varchar(40), StudentAdmissionDate date ); Query OK, 0 rows affected (0.67 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', '2019-01-21'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Robert', '2018-09-05'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('Mike', '2019-09-05'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values('David', '2019-10-04'); Query OK, 1 row affected (0.14 sec)Display all records from the ... Read More