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A CASE expression returns a single value that is conditionally evaluated for each row of a table (or view). Use the WHEN-THEN clauses when you want to execute a CASE expression for some but not all of the rows in the table that is being queried or created. An optional ELSE expression gives an alternative action if no THEN expression is executed.
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The SQL® procedure supports conditionally selecting result values from rows in a table (or view) in the form of a case expression. Similar to an IF-THEN construct in the DATA step, a case expression uses one or more WHEN-THEN clause(s) to conditionally process some but not all the rows in a table.
SQL Processing with SAS® Tip Sheet. This tip sheet is associated with the SAS® Certified Professional Prep Guide Advanced Programming Using SAS® 9.4. For more information, visit www.sas.com/certify. Basic Queries. PROC SQL <options>; SELECT column-1 <, ...column-n> FROM input-table <WHERE expression> <GROUP BY col-name> <HAVING expression>
17 cze 2024 · A CASE expression returns a single value that is conditionally evaluated for each row of a table (or view). Use the WHEN-THEN clauses when you want to execute a CASE expression for some but not all of the rows in the table that is being queried or created.
The CASE expression ...
26 lut 2024 · If we want to do conditional processing in a PROC SQL procedure, we can use the SAS case expression. For the conditions, we use when. When working with data, conditional processing is very useful for defining new variables and performing queries on our datasets.
18 lis 2016 · With the CASE expression, you can only create on column. To do what you want, the SQL can look like this: PROC SQL; CREATE TABLE MC_ET AS SELECT t1.MC , (year(t1.Date)) AS Year , count( case t1.ET when "Lath" then 1 else .
