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Variety of joins
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De
12/03/1998 23:29:45
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00084102
Message ID:
00084348
Vues:
17
Hello, >What is the difference between: >SELECT table1.* ; >FROM table1 ; >INNER JOIN table2 ; >INNER JOIN table3 ; >ON table3.key2 = table2.key2 ; >ON table2.key1 = table1.key1 >and >SELECT table1.* ; >FROM table1 ; >INNER JOIN table2 ; >ON table2.key1 = table1.key1 >INNER JOIN table3 ; >ON table3.key2 = table1.key2 ; The difference described in VFP5FAQ.TXT that can be found in your VFP directory... In short, the difference is how the parser process those SQL statements. The right one is latter. But I prefer to not use this syntax when I can use standard...
* Human is a question asked by birth and answered by death. Machine is another kind of question with another kind of answer
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