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AUTO INCREMENT PRIMARY KEY

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Other Lessons for You

Primary Key VS Unique Key In Database.

PRIMARY KEY UNIQUE KEY Primary key is a set of one or more fields/columns of a table that uniquely identify a record in database table. Primary keys must contain unique values. Unique-key...

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SQL Union Vs Union ALL

SQL UNION vs UNION ALL Operator Usage UNION: UNION combines the result set of two or more queries into a single result set. UNION removes duplicate records (where all columns in the results are the same). UNION...

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Structured query language-It is a language to interact with the database. Database-It is a collection of data's in the form of tables. Tables-Collection of rows and columns Rows are also called as tuples...

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Database Normalization

Database Normalization is the process of reducing duplication in database by decomposing the table1. Normal Form (1NF): Every attribute is atomic, Each cell to be single valued No multivalued attribute:...

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PLSQL- PROGRAM TO FIND THE GIVEN CHARACTER HOW MANY TIMES REPEATED

declare str varchar2(80):='&str'; ab char:='&ch'; i number; l number; c number; begin l:=length(str); for i in 1..l loop if (substr(str,i,1=ab)...

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SQL Programming Questions

Which is a good reference book to learn SQL and database from basics?

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