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Steilla Mitchel

Steilla Mitchel

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Aryan Kumar

Aryan Kumar

23-Aug-2023

To join two tables in Oracle to get single line results, you can use the following steps:

  1. Identify the columns that you want to join on. These columns must be common to both tables.
  2. Use the JOIN clause to join the two tables. The JOIN clause takes two or more tables and combines them into a single result set.
  3. Use the WHERE clause to specify the join condition. The join condition is a Boolean expression that determines which rows from the two tables are joined.
  4. Use the DISTINCT keyword to remove duplicate rows from the result set.

Here is an example of how to join two tables in Oracle to get single line results:

SQL

SELECT *
FROM table1
JOIN table2
ON table1.column1 = table2.column1
WHERE table1.column2 = 'value';

This query will join the table1 and table2 tables on the column1 column. The WHERE clause will then filter the results to only include rows where the column2 column is equal to value.

The DISTINCT keyword is not necessary in this case, but it can be used to remove duplicate rows from the result set.

I hope this helps! Let me know if you have any other questions.

Here are some other things to keep in mind when joining two tables in Oracle:

  • The INNER JOIN is the default join type. It only returns rows that match the join condition.
  • The LEFT JOIN returns all rows from the left table, even if there is no match in the right table.
  • The RIGHT JOIN returns all rows from the right table, even if there is no match in the left table.
  • The FULL JOIN returns all rows from both tables, even if there is no match in the other table.
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