How many parts of a pl sql block are optional?

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What are tables and fields in the database?

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What is substitution variable in pl sql?

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What is a database link?

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Is postgresql a server?

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i hv 30 rows with date.ex:1month hav 4 weeks i want 1st day of the every week.write the qry for that.example jan has 4 weeks i need 1st dd for evry wk

1 Answers   Aspire,

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Why partition by is used in sql?

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How to use sql statements in pl/sql?

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Name the operator which is used in the query for pattern matching?

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what are the t string functions available in tsql? : Transact sql

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How to run sql commands in sql*plus?

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What is clause?

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