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1 SELECT a.field1, b.field2, c.field3, d.field4
2 FROM atable a, atable b, ctable c, dtable d
3 ?
4 ORDER BY 1

What is the minimum number of joins that must be specified
on line 3 in the sample code above to properly link the
tables? Notice that the table "atable" is aliased twice:
once as "a" and once as "b."

1. One join
2. Two joins
3. Three joins
4. Four joins
5. Five joins

Question Posted / suresh

Answers were Sorted based on User's Feedback



1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? ..

Answer / rao

generally if n tables will n-1 joins
here 4 tables 3joins

Is This Answer Correct ?    8 Yes 2 No

1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? ..

Answer / arata kumar pattanaik

1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM
atable a, atable b, ctable c, dtable d 3 ? 4 ORDER BY 1
What is the minimum number of joins that must be specified
on line 3 in the sample code above to properly link the
tables? Notice that the table "atable" is aliased twice:
once as "a" and once as "b." 1. One join 2. Two joins 3.
Three joins 4. Four joins 5. Five joins
Answer
generally if n tables will n-1 joins
here 4 tables 3joins

Is This Answer Correct ?    2 Yes 0 No

1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? ..

Answer / mohan

There should be Three joins in where clause. no point of that the table "atable" is aliased twice. It will treat as two separate tables....

Is This Answer Correct ?    2 Yes 0 No

1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? ..

Answer / rao

generally if n tables will n-1 joins
here 4 tables 3joins

Is This Answer Correct ?    3 Yes 2 No

1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? ..

Answer / sss

We need minimum of n-1 joins to join n tables.
here 3 tables are there.
so we need minimum of 2 joins to join the 3 tables

Is This Answer Correct ?    3 Yes 2 No

1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? ..

Answer / satya

HERE WE HAVE TOTAL NO. OF TABLE IS 3 SO NO. OF JOIN REQUIRE
IS 2







Thanks
satya
+919916174212

Is This Answer Correct ?    2 Yes 2 No

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