how to saw triggers output in pl/sql database?

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What are the sql aggregate functions?

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Explain clause in sql?

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what is the difference between $message and $$message? : Sql dba

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in sql table following column r there i want find 1st paid ,2nd paid,3rd paid date for same |service_type|date |vehicle_no| |------------|------|_---------| |paid |23 jan|MH12H2007 | | | | | |paid |26 feb|MH12H2007 | | | | | | | | | |paid |28 mar|MH12H2007 | i want o/p like below vehicle no| 1st paid date | 2nd paid date|3rd paid |latest paid date| pls help me out

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What are the types of dbms?

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write a query to find 4th max salary

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How can the performance of a trigger be improved?

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if table named a is there and 4 records are there then how to swap (1 and 3) and (2 and 4) records at a time

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How many types of index are there?

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What are reports usually used for?

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Can a table contain multiple primary key’s?

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