SQL Server Query Question -


This can be a very simple question, but only curious about it.

Are these two questions

Question 1: 

  SELECT C. * FROM [Case] ​​A,  
 [Event] B, Information C, where ACIID = BCCID and B.EventID = C Avant ID

Question 2: 

  Select C. From [Case] ​​A involved in [Event] B AICISID = Notice of joining B.K.C.D. B. B.EventID = C.EventID

Please explain.

Yes, the same question, different syntax.

The second question is written in better form: 

  SELECT C. * FROM [Case] ​​A also includes a [Event] B Ai SID = BFIIIIIIIII Finally joins B.EventID = C.EventID on C

The second query using ANSI syntax has some advantages in advance:

  • It is easy to see that when you have missing ON section
  • makes it clear that type to join
  • Separate the section from WHERE

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