Difference between uniqe index and uniqe constraint?

546

SAS question: I have 50 fils a1,a2,...,a50. the primary key is upc. then if i want to merge all 50 files, the code is as follows, data test; merge a1 ... a50; by upc; run; we know that writing all 50 files name is time consuming, is there any standard format of this code?

1511

2. A product selected for testing is equally likely to have been produced by one the 6 machines/processes. (i) Determine sample space ‘S’ (ii) What is the probability that the product is from machine 1? (iii) What is the probability that the product is from machine 2 or machine 4? (iv) What is the probability that the product is from both machine 5 and machine 3? (v) What is the probability that the product is not from machine 6? (vi) What is the probability that the product is not from either machine 6 or machine 1?

1517

What is a comprehensive income?

639

do you have some of interview Questions in power and genrator section in general whith answers

1640

is WCT applicable one time? and what will be rate of WCT in UP State?

1465

Why instance based learning algorithm sometimes referred as lazy learning algorithm?

41

what are non-viral vectors?

1551

Do I need to load data into drill to start querying it?

5

Why do style sheets exist?

295

What is the use of plm (product lifecycle management) in sap pp?

595

What is dto in java?

476

What is the relation of a user account and a schema?

611

How are tolerance group for employees used?

586

How do you educate patients about their rheumatic conditions, treatment options, and self-management strategies?

1