Can you use compress in PROC SQL?
Can you use compress in PROC SQL?
To compress a data set using PROC SQL, the COMPRESS data set option should be stated after the table reference in the CREATE TABLE statement, as demonstrated in Figure 5 on the next page. proc sql; create table only_Bs(compress=yes) as select * from Scores(drop=A1-A10); quit; NOTE: Compressing data set WORK.
How do I compress 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 or missing (”.”) arguments in the second argument. A null or missing argument is treated as a string that has a length of zero.
How do I compress 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 word in SAS?
- Example 1: Compressing Blanks. data one; a=’AB C D ‘; b=compress(a); put b=; run;
- Example 2: Compressing Lowercase Letters.
- Example 3: Compressing Space Characters.
- Example 4: Keeping Characters in the List.
- Example 5: Compressing a String and Returning a Length of 0.
How do I get rid of extra spaces in SAS?
Remove Leading and Trailing Blanks with the STRIP Function 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 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 reduce the size of a table in SAS?
Another way to reduce the size of a SAS data set is by saving only the needed variables in a dataset using DROP and/or KEEP options. Also, using LENGTH or ATTRIB statements to assign the minimum lengths that are required for the variables in a SAS dataset can reduce the size of a SAS data set.
What is use of compress function in SAS?
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.
How do you 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.
What does it mean to compress a function?
Vertical compression means making the y-value smaller for any given value of x, and you can do it by multiplying the entire function by something less than 1. Horizontal stretching means making the x-value bigger for any given value of y, and you can do it by multiplying x by a fraction before any other operations.
What is compress function 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 you remove leading or trailing spaces in SQL?
SQL Server TRIM() Function The TRIM() function removes the space character OR other specified characters from the start or end of a string. By default, the TRIM() function removes leading and trailing spaces from a string.
How do you delete multiple spaces in SAS?
Sometimes, a string variable can have many words in it and extra spaces between the words. The easiest way to get rid of the extra spaces is to use SAS function compbl.
Why is my SAS running 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 can I improve my SAS skills?
Resolve to improve your SAS programming skills
- Lose Weight.
- Volunteer to Help Others.
- Quit Smoking.
- Get a Better Education.
- Get a Better Job.
- Save Money.
- Get Fit.
- Eat Healthy Food.
Can string be compressed?
The string should be compressed such that consecutive duplicates of characters are replaced with the character and followed by the number of consecutive duplicates. For example, if the input string is “wwwwaaadexxxxxx”, then the function should return “w4a3dex6”. This kind of compression is called Run Length Encoding.
How do you compress a function?
To vertically compress a function, multiply the entire function by some number less than 1. This is the opposite of vertical stretching: whatever you would ordinarily get out of the function, you multiply it by 1/2 or 1/3 or 1/4 to get the new, smaller y-value.
How do you know if a function is compressed or stretched?
How To: Given a function, graph its vertical stretch.
- Identify the value of a .
- Multiply all range values by a .
- If a>1 , the graph is stretched by a factor of a . If 0