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Database

Interview questions

QuestionAnswer
What is a Primary Key: primary keys must contain unique values/A field that uniquely identifies a record in a table
Foreign keys foreign keys may have duplicates
What is an index summary table which lets you quickly look up the contents of any record in a table. Think of how you use an index to a book: as a quick jumping off point to finding full information about a subject.
normalisation The process of structuring data to minimise duplication and inconsistencies.
Count duplicates select distinct city, count(city) from A2Account group by city
what is a group by statement "Group By X" means "put all those with the same value for X in the one group. "Group By X, Y" means "put all those with the same values for both X and Y in the one group."
group by having? The Having is simply equivalent to a WHERE clause after the group by has executed and before the select part of the query is computed.
how much space in sybase • sp_hds • sp_helpdb • sp_spaceused
Created by: topbeagle
Popular Computers sets
Definitions for Word Processing and the main parts of the MS Word 2010 window
WP Page Formatting
WP Paragraph Formatting terms
Review business letter parts
Bus Letter Format
Intel Lessons
Bus Lett Line Space
WP Editing Features
Table Formatting
Review the three paragraph formats (block, indented, hanging indent)
WP font formatting features in Word 2010
Arkansas CBA unit 1 Hardware

 

 



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