PROC SQL yog muaj zog Base SAS7 txheej txheem uas sib txuas ua haujlwm ntawm DATA thiab PROC cov kauj ruam rau hauv ib kauj ruam. … PROC SQL tuaj yeem siv los khaws, hloov kho, thiab tshaj tawm cov ntaub ntawv los ntawm SAS cov ntaub ntawv teev lossis lwm yam khoom siv database.
PROC SQL siv rau dab tsi?
PROC SQL siv SQL los tsim, hloov kho, thiab khaws cov ntaub ntawv los ntawm cov ntxhuav thiab kev pom (thiab SAS cov ntaub ntawv teev). PROC SQL tuaj yeem siv rau hauv cov kev pabcuam batch lossis thaum lub sijhawm sib tham sib tham SAS. PROC SQL tuaj yeem ua tau ntau yam haujlwm los ntawm DATA cov kauj ruam, thiab cov txheej txheem PRINT, SORT, MEANS thiab SUMMARY cov txheej txheem.
Proc txhais li cas hauv SQL?
Ib txheej txheem khaws cia (tseem hu ua proc, storp, sproc, StoPro, StoredProc, StoreProc, sp, lossis SP) yog cov txheej txheem subroutine muaj rau cov ntawv thov uas nkag mus rau kev tswj hwm kev sib raug zoo. system (RDBMS). Cov txheej txheem zoo li no tau muab tso rau hauv cov ntaub ntawv phau ntawv txhais lus.
Qhov txawv ntawm PROC SQL thiab SQL yog dab tsi?
Structured Query Language (SQL) yog ib hom lus siv dav rau kev khaws thiab hloov kho cov ntaub ntawv hauv cov ntxhuav thiab / lossis kev pom ntawm cov ntxhuav. Nws muaj nws keeb kwm nyob rau hauv thiab feem ntau yog siv rau retrieval cov ntxhuav nyob rau hauv relational databases. PROC SQL yog qhov kev siv SQL hauv SAS System.
Koj sau li cas PROC SQL?
Zaj 1: PROC SQL Tutorial rau Beginners (20 Piv txwv)
- PROC SQL;
- SELECT kem(s)
- FROM table(s) | view(s)
- WHERE expression.
- GROUP BY column(s)
- HAVING expression.
- ORDER BY kem(s);
- QUIT;
