Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Database Articles
Page 343 of 547
Find out the popular domains from a MySQL table with domain records and search volume
For this, you can use GROUP BY along with the ORDER BY clause. Let us first create a table &mins;mysql> create table DemoTable -> ( -> URL varchar(40), -> DomainName varchar(20), -> SearchTimes int -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('www.gmail.com', 'gmail.com', 4); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values('www.google.com', 'google.com', 3); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values('www.gmail.com', 'gmail.com', 9); Query OK, 1 row affected (0.15 sec) mysql> insert ...
Read MoreHow to display the storage engine while implementing JDBC - MySQL CONNECTION query?
Use SELECT ENGINE to display the storage engine name. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20), -> Age int, -> CountryName varchar(20) -> ); Query OK, 0 rows affected (0.63 sec)Here is the Java code to get the storage engine using JDBC −Exampleimport java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class GetTheStorageEngine { public static void main(String[] args) { String hostURL = "jdbc:mysql://localhost:3306/web?useSSL=false"; Connection con = null; ...
Read MoreGet last second of a date in MySQL?
To get the last second of a date in MySQL, use the INTERVAL command. Let us first create a table −mysql> create table DemoTable -> ( -> JoiningDatetime datetime, -> DueDatetime datetime -> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(JoiningDatetime) values('2019-11-03 12:34:54'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(JoiningDatetime) values('2019-10-04 12:34:54'); 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 −+---------------------+-------------+ | JoiningDatetime ...
Read MoreText manipulation of strings containing "The "? in MySQL
You can use ORDER BY TRIM(). Let us first create a table −mysql> create table DemoTable -> ( -> Title text -> ); Query OK, 0 rows affected (1.09 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('MongoDB is a no SQL database'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('The MySQL is a relational database'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('The Java language is good'); Query OK, 1 row affected (0.35 sec) mysql> insert into DemoTable values('Python is good language'); Query ...
Read MoreFix Connectivity error in Java MySQL connection for connector to be set to class path?
To fix, you need to put MySQL connector to the Java classpath. Import the jar file of the connector to the project folder for the IDE you are using.Here is the snapshot to place classpath −Let us now see the code for connectivity in Java with MySQL −This will produce the following output −
Read MoreHow to replace a character in a MySQL table?
To replace only a single character, use REPLACE() in MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(20) -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John Smitk'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('David Miller'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('Adam Smitk'); Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following ...
Read MoreHow to implement MySQL ORDER BY x where (x=col3 if col3!=null, else x=col2)?
For this, you can use ORDER BY IFNULL(). Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(20), -> CountryName varchar(20) -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', NULL); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('David', 'AUS'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(NULL, 'UK'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(NULL, 'AUS'); Query OK, 1 row affected (0.10 sec) mysql> ...
Read MoreWhat would happen if we insert empty values in a table with a column set as type TIMESTAMP CURRENT_TIMESTAMP?
If we will insert nothing in the INSERT statement, then for timestamp type, it would insert the current date-time. Let us first create a table −mysql> create table DemoTable -> ( -> UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> UserLoginDate timestamp default current_timestamp -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (0.08 ...
Read MoreSort items in MySQL with dots?
Let us first create a table −mysql> create table DemoTable -> ( -> Value varchar(20) -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('20'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('10.5'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('11'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('10'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('20.5'); Query OK, 1 row affected (0.13 sec)Display all records from the table ...
Read MoreThe easiest way to insert date records in MySQL?
Use the STR_TO_DATE() method to insert date records as in the below syntax −select str_to_date(yourColumnName, '%b %Y') from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> JoiningYear varchar(20) -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Jan 2018'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('May 2107'); Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable values('Aug 2019'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Oct 2020'); Query OK, ...
Read More