What are the ways on commenting in a pl/sql code?

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Name some usages of database trigger?

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Is postgresql a server?

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Is foreign key mandatory?

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What are schema-level triggers?

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What is a memo field?

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i have a table like this. cityno cityname mails 1 BANGALORE 8KM 2 HSR LAYOUT 20KM 3 MEJISTIC 30KM 4 JAYADEVA 55KM 5 ITPL 80KM 6 HEBBAL 115KM I HAVE DATA LIKE THIS I WANT O/P LIKE THIS DISTANCE NO.OFCITY 0-50KM 3 51-100KM 2 101-150KM 4 AND SO ON pls give me answer. i want urgent

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How to retrieve a second highest salary from a table? Note:Suppose salaries are in duplicate values eg: Name Sal Malli 60000 Pandi 60000 Rudra 45000 Ravi 45000

10 Answers   Mind Tree, Polaris, Sonata,

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Mention what does plvtab enables you to do when you showthe contents of pl/sql tables?

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What are the limitations of sql express?

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State some properties of relational databases?

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How can I pass the inner procedure value to outer procedure ?

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