How to Get Multiple Columns Values Into Single Row In Oracle?

To get multiple column values into a single row in Oracle, you can use the concatenation operator (||) along with the SELECT statement. By concatenating the values of different columns, you can display them as a single value in a single row. Additionally, you can use the CONCAT function to concatenate multiple column values. Another way to achieve this is by using the LISTAGG function, which aggregates the values from multiple rows into a single row. This function allows you to specify the delimiter between the values. These methods can help you display multiple column values in a single row in Oracle.

How do I unpivot multiple column values into a single row in Oracle?

To unpivot multiple column values into a single row in Oracle, you can use the UNPIVOT statement. Here is an example of how you can achieve this:

Let's assume you have a table called employee with columns emp_id, emp_name, salary_2019, and salary_2020:

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CREATE TABLE employee (
    emp_id NUMBER,
    emp_name VARCHAR2(50),
    salary_2019 NUMBER,
    salary_2020 NUMBER
);

INSERT INTO employee VALUES (1, 'John', 50000, 55000);
INSERT INTO employee VALUES (2, 'Emily', 60000, 65000);

To unpivot the salary_2019 and salary_2020 columns into a single row, you can use the following SQL query:

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SELECT 
    emp_id,
    emp_name,
    year,
    salary
FROM
    employee
UNPIVOT (
    salary for year in (salary_2019 as '2019', salary_2020 as '2020')
);

This query will return the following result:

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EMP_ID   EMP_NAME   YEAR   SALARY
1        John       2019   50000
1        John       2020   55000
2        Emily      2019   60000
2        Emily      2020   65000

In this result, each employee's salary_2019 and salary_2020 values have been unpivoted into separate rows with an additional year column.

How can I unpivot multiple columns into a single row in Oracle?

To unpivot multiple columns into a single row in Oracle, you can use the UNPIVOT clause in a SQL query. Here is an example of how you can unpivot multiple columns into a single row in Oracle:

Let's say you have a table my_table with the following structure:

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ID  |  Name  |  Category1  |  Value1  |  Category2  |  Value2
--------------------------------------------------------------
1   |  John  |  A          |  10      |  B          |  20

You can unpivot the Category1, Value1, Category2, and Value2 columns into a single row like this:

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SELECT ID, Name, Category, Value
FROM my_table
UNPIVOT
(
  (Category, Value) FOR Data IN 
  ((Category1, Value1) AS 'Data1',
   (Category2, Value2) AS 'Data2')
)

This query will return the following result:

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ID  |  Name  |  Category  |  Value
-----------------------------------
1   |  John  |  A         |  10
1   |  John  |  B         |  20

In this result, each row represents one pair of Category and Value from the original columns that were unpivoted.

What is the function used to aggregate multiple values into a single row in Oracle?

The function used to aggregate multiple values into a single row in Oracle is LISTAGG.

How can I combine multiple column values into a single row in Oracle?

You can use the CONCAT function to combine multiple column values into a single row in Oracle. Here is an example:

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SELECT CONCAT(column1, ', ', column2, ', ', column3) AS combined_values
FROM your_table;

This will concatenate the values in column1, column2, and column3 with a comma and space between each value, and display the result in a new column called combined_values. You can add more columns and customize the separator as needed.

What is the command to pivot data from multiple columns into a single row in Oracle?

In Oracle, you can use the PIVOT command to pivot data from multiple columns into a single row. Here is an example of how you can use the PIVOT command:

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SELECT *
FROM (
    SELECT column1, column2, column3
    FROM your_table
)
PIVOT (
    MAX(column2)
    FOR column1 IN ('value1' as pivot_column1, 'value2' as pivot_column2, 'value3' as pivot_column3)
)

In this example, column1 will be pivoted into separate columns based on the values 'value1', 'value2', and 'value3' from column1, and column2 will be displayed in each corresponding pivot column.

How to concatenate multiple column values into a single row in Oracle?

In Oracle, you can concatenate multiple column values into a single row using the LISTAGG function. Here is an example query:

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SELECT LISTAGG(column_name, ', ') WITHIN GROUP (ORDER BY column_name) AS concatenated_values
FROM table_name;

Replace column_name with the column names you want to concatenate and table_name with the name of the table where the columns are located. This query will concatenate the values of the specified columns into a single row, separated by commas. You can adjust the separator by changing the , within the LISTAGG function.

Keep in mind that the LISTAGG function has a character limit, so you may need to truncate or limit the concatenated values if they exceed the character limit.