How do I compress a table in SAS?
To use the COMPRESS= system or data set option, set the option to either “YES” or “BINARY.” (In newer versions of SAS, “CHAR” can be used as an alternative to “YES” with the same result.) The COMPRESS=YES value uses an algorithm that works better with SAS data sets that are primarily comprised of character variables.
How do I reduce the size of a SAS dataset?
The two ways to compress data sets in SAS:
- Using the option in the DATA step to compress a data set: data ssd.income (compress=yes);
- To compress all data sets created within a SAS sessions: options compress=yes;
How do I compress a dataset?
One way to compress a data set is to use the COMPRESS=YES system option: options compress=yes; All subsequently created data sets will be stored in compressed form.
What does compress in SAS do?
The COMPRESS function compiles a list of characters to keep or remove, comprising the characters in the second argument plus any types of characters that are specified by the modifiers. All blanks have been removed. If the argument is completely blank, then the result is a string with a length of zero.
Can you use compress in PROC SQL?
Re: Using COMPRESS function inside a PROC SQL with modifiers isn’t allowed. You can code the 2nd argument as an explicit list of characters to compress out, and omit the third argument altogether. Use the concatenation operator and create a string to list your characters.
How do I remove special characters from a string in SAS?
We can remove special characters from a string variable in SAS with the help of the compress() function modifiers. We can pass “kas” as a modifier which keeps (k) the alphabetical characters (a) and spaces (s) of a string variable.
How does SAS handle large data?
One can think of making a large SAS dataset smaller by using SAS statements like LENGTH or dataset compression tools like COMPRESS option to save the storage space. Reducing the size of the dataset can also help in reducing the time SAS takes to read or access data from a dataset.
Which program is used to compress a partitioned data set?
It is a good idea to make a copy of the data set that you intend to compress-in-place before you actually do so. You can use the same execution of IEBCOPY to do both, and a following job step could delete the backup copy if the IEBCOPY job step ends with a return code of 0.
How do I compress a file in SAS?
Use the COMPRESS= data set option to compress an individual file. Specify the option for output data sets only. That is, specify data sets named in the DATA statement of a DATA step or in the OUT= option of a SAS procedure. Use the COMPRESS= data set option only when you are creating a SAS data file (member type DATA).
How do I remove spaces from a column in SAS?
TRIM Function in SAS Removes all the Trailing spaces. TRIM() Function in SAS takes column name as argument and removes the trailing space.
How do I remove spaces from a string in SAS?
set string; comp = compress(text); run; The COMPRESS function compresses the character value and removes all of the blank spaces from the string.
How do I compress a character in SAS?
To remove digits and plus or minus signs, you could use the following function call: COMPRESS(source, “1234567890+-“); compress(source, “+-“, “d”); The COMPRESS function allows null values and SAS missing values in the second argument. A null or missing value is treated as a string that has a length of 0.
How do I compress a word in SAS?
COMPRESS function is basically used to compress/removes all the spaces/blanks in a character string. In other words, it removes leading, between and trailing spaces from the strings.
How do I speed up a SAS query?
There are several ways to improve query performance, including the following: using indexes and composite indexes. using the keyword ALL in set operations when you know that there are no duplicate rows, or when it does not matter if you have duplicate rows in the result table.
How can I make SAS run faster?
To improve the performance of a SAS job, we must reduce the number of times SAS accesses disk or tape devices. We can reduce the number of data accesses by processing more data each time a device is accessed by setting the BUFNO=, BUFSIZE=, CATCACHE=, and COMPRESS= system options.
How do I compress a partition?
To compress the existing data in the partition, you must move the partition. Enabling compression and moving a partition can be done in a single operation.
Which of the ISPF option is used to compress a partitioned dataset?
Overview. The COMPRESS command allows TSO/E users to compress a partitioned data set (PDS) with DISP=SHR using a protection scheme compatible with ISPF and the linkage-editor. It also allows several data sets to be compressed with a single command by specifying a generic data set name such as ‘SYS2. *’.
How do I use options in SAS?
The OPTIONS statement requires you to enter the complete statement including system option name and value, if necessary. The SAS OPTIONS window displays the options’ names and settings in columns. To change a setting, type over the value that is displayed and press Enter or Return.
How do I use trim in SAS?
The TRIM function copies a character argument, removes trailing blanks, and returns the trimmed argument as a result. If the argument is blank, TRIM returns a string with a length of zero. TRIM is useful after concatenating because concatenation does not remove trailing blanks.
How do I get rid of extra spaces in SAS?
One of the most used functions in SAS to remove blanks is the STRIP-function. Like the TRIM- and TRIMN-functions, the STRIP-function removes trailing blanks. However, the STRIP-function also removes the leading blanks from a string.
How do I trim a string in SAS?
How do you remove unwanted characters from a string in SAS?
The SAS compress() function allows us to remove characters from strings easily. compress() takes 3 arguments. The first argument is a character variable. The second argument is the characters you want to keep or remove – we can keep characters with compress() as well.
How do I reduce processing time in SAS?
Why is SAS so slow?
Slow system performance can be the result of many issues, such as outdated hardware to even users having poor programming techniques that overwhelm the system. While there are no known shark attacks on SAS servers, here are a few factors to consider as you diagnose your system performance.
How do I enable data compression?
Here’s how to turn it on: touch the Menu Button (the three vertical dots) then touch Settings. Scroll down select Data Saver toggle the option to On. It’s just a couple of steps to turn on this slick feature in Chrome for Android. You’re all set.