apache hive - Hive Create Database - hive tutorial - hadoop hive - hadoop hive - hiveql
apache hive related article tags - hive tutorial - hadoop hive - hadoop hive - hiveql - hive hadoop - learnhive - hive sql
What is Hive?
- Hive is a database technology that can define databases and tables to analyze structured data.
- The theme for structured data analysis is to store the data in a tabular manner, and pass queries to analyze it.
- This hive tutorial explains how to create Hive database.
- Hive contains a default database named default.
learn hive - hive tutorial - mysql vs hiveql - hive programs - hive examples
How to Create Database in Hive?
Create Database Statement
- Create Database is a statement used to create a database in Hive.
- A database in Hive is a namespace or a collection of tables.
learn hive - hive tutorial - hive create database - hive programs - hive examples
Syntax:
CREATE DATABASE|SCHEMA [IF NOT EXISTS] <database name>
Clicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy hive tutorial team
- Here, IF NOT EXISTS is an optional clause, which notifies the user that a database with the same name already exists.
- We can use SCHEMA in place of DATABASE in this command.
- The following query is executed to create a database named userdb:
hive> CREATE DATABASE [IF NOT EXISTS] userdb;
Clicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy hive tutorial team
- or
hive> CREATE SCHEMA userdb;
Clicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy hive tutorial team
- The following query is used to verify a databases list:
hive> SHOW DATABASES;
default
userdb
Clicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy hive tutorial team
apache hive - learn hive - hive tutorial - hive create database - hive example
apache hive related article tags - hive tutorial - hadoop hive - hadoop hive - hiveql - hive hadoop - learnhive - hive sql
JDBC Program
- The JDBC program is used to create a database and hence the program is given below.
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.DriverManager;
public class HiveCreateDb {
private static String driverName = "org.apache.hadoop.hive.jdbc.HiveDriver";
public static void main(String[] args) throws SQLException {
// Register driver and create driver instance
Class.forName(driverName);
// get connection
Connection con = DriverManager.getConnection("jdbc:hive://localhost:10000/default", "", "");
Statement stmt = con.createStatement();
stmt.executeQuery("CREATE DATABASE userdb");
System.out.println(“Database userdb created successfully.”);
con.close();
}
}Clicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy hive tutorial team
- The commands are used to compile and execute this program.
Sample Code:
$ javac HiveCreateDb.java
$ java HiveCreateDb
Clicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy hive tutorial team
apache hive related article tags - hive tutorial - hadoop hive - hadoop hive - hiveql - hive hadoop - learnhive - hive sql
Output:
Database userdb created successfully.