Q 1 > SELECT Count(1) as Output
1> NULL
2> Error
3> 1
4> Invalid select statement
Answer
Q 2 > SELECT Count(*) as Output
1> NULL
2> 1
3> Error
4> Invalid select statement
Answer
Q 3 > SELECT Count(NULL) as Output
1> NULL
2> 1
3> Error
4> Operand data type NULL is invalid for count operator
Answer
Q 4 > SELECT 1 as Value FROM (SELECT ‘A’ as a) AS tbl
1> NULL
2> 1
3> Error
4> Invalid Syntax
Answer
Q 5 > SELECT SUM(NULL) as Total
1> NULL
2> 1
3> Operand data type NULL is invalid for sum operator
4> Invalid Syntax
Answer
Q 6 > SELECT 1 UNION select ‘A’
1> Conversion failed when converting the varchar value ‘A’ to data type int
2> A
3>VALUE
———
1
A
4>1
Answer
Q 7 > SELECT 1 as Value UNION select ‘1’
1> Conversion failed when converting the varchar value ‘1’ to data type int
2> A
3> Error
4>1
Answer
Q 8 > SELECT 1 as VALUE UNION ALL SELECT 1 as VALUE
1> Conversion failed when converting the varchar value ‘1’ to data type int
2> VALUE
——–
1
1
3> Invalid syntax
4>1
Answer
Q 9 > SELECT 1 as val INTERSECT
( SELECT 1 val UNION ALL SELECT 2 )
1> 1
2> val
——–
1
2
3> val
——–
1
2
4> Invalid Syntax Intersect
Answer
Q 10 > SELECT 5 as val EXCEPT
( SELECT 1 val )
1> 1
2> val
——–
1
5
3> 5
4> Invalid Syntax Except
Answer
Q 11 > select 100 * 1.0 as val
1> 100.00
2>100
3> 100.0
4>Error
Answer
Q 12 > Select 1/case when null=null then 0 else 1 end as val
1> 1
2>0
3>Divide by zero error encountered.
4> Error
Answer
Q 13 > Select 1/case when null=’0′ then 0 else 1 end as val
1> 1
2>0
3>Divide by zero error encountered.
4> Error
Answer
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