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SQL UPDATE SUBQUERY

Suprio Dutta

29/01/2024 0 0

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Other Lessons for You

Interview questions based on "level", a pseudocolumn

1. Write a query to get the below output, 1 11 21 31 .. .. 91 2 12 22 32 .. .. 92 3 13 23 33 .. .. 93 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 10 20 30 40 ...

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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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Cursors In SQL Server

First thing first Usage of Cursors is not encouraged in SQL Server as they are slow. You may go with While loop if you need to iterate through a recordset. Cursor is a database object to retrieve data...

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Looping In Oracle SQL Using Level

We will see about the syntax LEVEL in Oracle sql. If we want to loop through and print a set of values in SQL, LEVEL could come handy. Example query: SELECT 'hi', LEVEL FROM DUALCONNECT BY LEVEL <=...

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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 Programming Questions

How do I become master in SQL server? I am looking for real time case studies to write queries, stored procedures etc.

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