What is union and union all keyword in sql and what are their differences?

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how can i read files from a pl/sq l program

3 Answers  

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What are different types of tables in sql?

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What are the types of variables use in pl sql?

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wt is the diff b/w greast and max ,least and min? wt is the diff b/w case and decod?

4 Answers   Oracle, TCS, Tecnics,

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In a Distributed Database System Can we execute two queries simultaneously ? Justify ?

3 Answers  

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I have following column in the table. col1 1 a b c 2 3 d and I want to display it as num chars 1 a 2 b 3 c 4 d numbers in one column and letters in another column.

1 Answers   IBM, Saama Tech,

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What is normalization? How many normalization forms are there?

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Is pl sql useful?

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how can we transpose a table using sql (changing rows to column or vice-versa) ? : Sql dba

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what are the differences between binary and varbinary? : Sql dba

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What are the different ways to optimize a sql query?

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