Oracle distinct all columns

Well the title says it all. We can count distinct values such as in select count (distinct col1) from mytable;. I need all columns in a table but two columns must be distinct.

I used this code but It check all columns , but I only need two of them will be distinct. How can I satisfy this? The are sorted in ascending order by city. ALL_TAB_ COLUMNS describes the columns of the tables, views, and clusters accessible to the current user.

To gather statistics for this view, use the ANALYZE SQL statement or the DBMS_STATS package. DBA_TAB_ COLUMNS describes the columns of all tables, views, and clusters in the database. I mean it would be something like this: select distinct (colcolcolcolcol5), colfrom table. Is there an easier way of doing a COUNT(DISTINCT) on multiple items than converting them to strings and concatenating them? I would like to use distinct on the following table,.

If the table has no data, then the number of rows are zero which also means the number of distinct values for that column is zero as well. The following will make all three columns distinct. Example - Finding Unique Values in Multiple Columns. I want only the Job_ID column to be distinct. Ask Question Asked years, months ago.

The order_by_clause and windowing_clause are not allowed. You can count either all rows, or only distinct values of expr. If you specify expr, then COUNT returns the number of rows where expr is not null. Answer: By Laurent Schneider, from his book ? In this query we start by selecting the distinct values for all columns. Specify the object name followed by a period and the asterisk to select all columns from the specified table, view, or materialized view.

A query that selects rows from two or more tables, views, or materialized views is a join. However, you should use the GROUP BY clause when you want to apply an aggregate function on one or more columns. I am selecting distinct on a code field but I cannot figure how to return the rest of the columns. The issue is with this line. DISTINCT can be used with aggregates: COUNT, AVG, MAX, etc.

Question: I need to display distinct records of each column within a single table. To select distinct result for a specific column,. This Video is in the conti.

Oracle Select Distinct with One or More Columns. This may be what you are looking for. If you want to SUM one column based on the distinct values of another column, you may want to use a subquery to get the distinct values, and then perform a SUM. The combination of values in the city and country columns are used to determine the uniqueness of rows in the result set.

This removes the need to create complex query processing to find the distinct values prior to using the aggregate LISTAGG function.