Db2 select distinct

The function is applied to the set of values derived from the argument values by the elimination of null values. The DISTINCT predicate cannot be used in the following contexts. To do this, you use the DISTINCT keyword in the SELECT clause as follows: SELECT DISTINCT columnname FROM tablename. The argument of COUNT (expression) or COUNT (ALL expression) is a set of values. DISTINCT will eliminate those rows where all the selected fields are identical.

SELECT DISTINCT FROM YOUR TABLE Which will give you every distinct combination of your (in this case) columns. The result is the number of nonnull values in the set, including duplicates. When the predicate IS NOT DISTINCT FROM, the result of the predicate is true if all pairs of corresponding value expressions evaluate to true (null values are considered equal to null values).

Use DISTINCT with other column functions when you want only the distinct values for the columns within a group to be used.

The column values are produced by the application of the select list to R. SELECT DISTINCT EmpI ProjectId FROM TableX WHERE EmpId IN ( SELECT EmpId FROM TableX GROUP BY EmpId HAVING COUNT (DISTINCT ProjectId) ) This should give you. EmpId ProjectId row(s) Edit Content added for OPs additional question in the comments. DISTINCT for multiple columns is not supported.

DISTINCT can be used with aggregates: COUNT, AVG, MAX, etc. SELECT DISTINCT returns only distinct (different) values. The select list is a list of names and expressions specified in the SELECT clause, and R is the result of the previous operation of the subselect. Introduction to DbSELECT DISTINCT Sometimes, you want to select distinct values from one or more columns of a table. If you do that, you can either use select distinct or group by.

The SELECT DISTINCT statement is used to return only distinct (different) values. At least in DB you can execute. SQL SELECT with DISTINCT on multiple columns: Multiple fields may also be added with DISTINCT clause. DISTINCT comes before the first column name and is not separated from the column name with a comma.

SELECT DISTINCT eliminates duplicate records from the. DISTINCT applies to all the columns that are selected. Otherwise, you ll have to specify what columns you want to include.

Inside a table, a column often contains many duplicate values and sometimes you only want to list the different (distinct) values. The SELECT clause specifies the columns of the final result table. The argument of COUNT (DISTINCT expression) is a set of values. Ausserdem zeigen wir, was dich nach der Bestellung genau erwartet. Ber Millionen User weltweit k nnen nicht so falsch liegen - und das tun sie auch nicht.

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