Category Archives: Learn SQL

How to connect Oracle Database in Java

Connect Oracle Database

If you want to access oracle 10g database via JDBC connection, you need to set CLASS PATH environment variable to find the ojdbc14.jar file provided by Oracle. The file is located in  “C:\oracle\product\10.2.0\db_1\jdbc\lib\ojdbc14.jar ” This is sample JDBC Connection string to connect Oracle database in Java Connection conn = null; Class.forName("oracle.jdbc.driver.OracleDriver"); conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","user_name","Pass_word”"); conn.close();     

Transpose Rows into Columns

Transpose Rows in Oracle

You can use these best and easy tips to Transpose rows into columns. You can also Transpose columns into rows in Oracle.

Joins – Left outer, Right outer and full outer

SQL Joins in Oracle

The purpose of SQL join is to combine rows from multiple tables. SQL join is performed by the where clause which combines two or more tables in an SQL statement. There are four types of joins which described below: INNER JOIN or sometimes called SIMPLE JOIN LEFT OUTER JOIN or sometimes called LEFT JOIN RIGHT

How to create a PIVOT table in Oracle.

Create a Pivot Table in Oracle

First create a PLANNING table in oracle using following script. CREATE TABLE PLANNING (CITY VARCHAR2(25), TYPEOFCITY VARCHAR2(20), CONSUMERS NUMBER(20), SURVEYEDCONSUMERS NUMBER(20)); Now insert some dummy records in the table. insert into PLANNING values ('AJMER','URBAN',85589,45836); insert into PLANNING  values ('AJMER','RURAL',13853,8328); insert into PLANNING values ('BHILWARA','URBAN',54149,27327); insert into PLANNING values ('BHILWARA','RURAL',8384,4331); insert into PLANNING values ('NAGOR','URBAN',49752,43919); insert

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