How do you use distinct in SAS?

How do you use distinct in SAS?

You can use the DISTINCT predicate to see whether two values or two row values are equal to one another. The DISTINCT predicate evaluates to true only if all rows that its subquery returns are distinct. Note: Two null values are not considered distinct.

How do I get distinct values in PROC sql?

The INTO: clause and SEPARATED BY argument from SELECT DISTINCT in the PROC SQL procedure creates a macro variable which is a string of characters that contains all distinct values of the rows from the column that gets selected, in the alphabetical order that separated by a specified delimiter.

How do I get unique values from a column in SAS?

The following code shows how to count the distinct values in the points column, grouped by the team column: /*count distinct values in points column, grouped by team*/ proc sql; select team, count(distinct points) as distinct_points from my_data group by team; quit; What is this?

How do you remove duplicates in SAS?

You can use proc sort in SAS to quickly remove duplicate rows from a dataset. This procedure uses the following basic syntax: proc sort data=original_data out=no_dups_data nodupkey; by _all_; run; Note that the by argument specifies which columns to analyze when removing duplicates.

What is SELECT distinct in sql?

The SQL SELECT DISTINCT Statement The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.

What is Dupout in SAS?

The DUPOUT= option is used with either the NODUPKEYS or NODUPRECS option to name a data set that will contain duplicate keys or duplicate observations. The DUPOUT= option is generally used when the data set is too large for visual inspection. In the next code example, the DUPOUT= and NODUPKEY options are specified.

How does Nodupkey work in SAS?

The NODUPKEY option removes duplicate observations where value of a variable listed in BY statement is repeated while NODUP option removes duplicate observations where values in all the variables are repeated (identical observations).

What is the difference between Nodup and Nodupkey in SAS?

The NODUP option in the SORT procedure eliminates observations that are exactly the same across all variables. The NODUPKEY option eliminates observations that are exactly the same across the BY variables. Keep in mind that both of these options compare adjacent observations in the output data set.

How do I eliminate duplicates in SAS?

The Sort Procedure with the NODUPKEY option is the simplest and most common way of removing duplicate values in SAS. Simply specify the NODUPKEY option in the PROC SORT statement. In the BY statement, specify the variables by which you want to remove duplicates.

How do I use substr in SAS?

Suppose you want to change just a few characters of a variable— use the SUBSTR function on the left side of the assignment statement. data _null_ ; phone = ‘(312) 555-1212’ ; substr(phone, 2, 3) = ‘773’ ; run ; In this example, the area code of the variable PHONE was changed from ‘312’ to ‘773’.

How do you SELECT unique records from the particular column?

To get unique or distinct values of a column in MySQL Table, use the following SQL Query. SELECT DISTINCT(column_name) FROM your_table_name; You can select distinct values for one or more columns. The column names has to be separated with comma.