What is sql*loader and what is it used for? : aql loader


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3 Answers   Satyam,


Are views faster than queries?

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Do ddl statements need commit?

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What is the use of & in pl sql?

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In a table i have columns A,B,C and i have a composite index on columns A,B if so will the following query uses index or not? SELECT sal,name FROM <table_name> WHERE A=<value> AND B=<value> AND C=<value>;

2 Answers   Mastek,


3. Select sum(a) sum_1,max(a) max_1 ,count(a) count_1 from ( ( select 1 a from dual union all Select to_number(‘2011’) a from dual union all select 1 a from dual) union select 2 b from dual);

1 Answers   Fintellix,


why not null constraint showing its constraint type as 'c'

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