How do you modify a table in sql?

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What is a unique constraint?

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What do you mean by “trigger” in sql?

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What is sql stand for?

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if we give update table_name set column_name= default. what will happen? its given in pl sql block.what will hapen?

5 Answers   iFlex,

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What is sql and also describe types of sql statements?

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will function return more than one value how

9 Answers   Accenture,

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How do I run a sql query in pgadmin 4?

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I have one table and column is c1 pk, c2 not null,c3 not null and 200 row in it and i add c4 column and value, how can is possible

9 Answers  

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What does desc stand for?

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Is sql a backend?

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What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

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