A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 5, Problem 18CAT
Program Plan Intro
DISTINCT Keyword: “DISTINCT” keyword is used to avoid redundant data (removing duplicate values) from a column. The syntax for “DISTINCT” keyword is as follows:
Syntax:
SELECT DISTINCT column_Name FROM table_Name;
AND Operator:
In SQL, “AND” keyword is used in order to check two and more than two conditions. This usually works well with “WHERE” clause.
Syntax:
SELECT * FROM table_Name WHERE condition1 AND condition2;
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I need help creating the network diagram and then revising it for the modified activity times.
Activity No.
Activity
Time (weeks)
Immediate Predecessors
1
Requirements collection
3
2
Requirements structuring
4
1
3
Process analysis
3
2
4
Data analysis
3
2
5
Logical design
50
3,4
6
Physical design
5
5
7
Implementation
6
6
c. Using the information from part b, prepare a network diagram. Identify the critical path.
Given the following Extended-BNF grammar of the basic mathematical expressions:
Show the derivation steps for the expression: ( 2 + 3 ) * 6 – 20 / ( 3 + 1 )
Draw the parsing tree of this expression.
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Chapter 5 Solutions
A Guide to SQL
Ch. 5 - Prob. 1RQCh. 5 - Prob. 2RQCh. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - Prob. 5RQCh. 5 - Prob. 6RQCh. 5 - Prob. 7RQCh. 5 - What does it mean for two tables to be union...Ch. 5 - Prob. 9RQCh. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - Prob. 1TDCh. 5 - Prob. 2TDCh. 5 - Prob. 3TDCh. 5 - Prob. 4TDCh. 5 - Prob. 5TDCh. 5 - Prob. 6TDCh. 5 - Prob. 7TDCh. 5 - Prob. 8TDCh. 5 - Prob. 9TDCh. 5 - Prob. 10TDCh. 5 - Prob. 11TDCh. 5 - Prob. 12TDCh. 5 - Prob. 13TDCh. 5 - Prob. 14TDCh. 5 - Prob. 15TDCh. 5 - Prob. 16TDCh. 5 - Prob. 17TDCh. 5 - Prob. 18TDCh. 5 - Prob. 20TDCh. 5 - Prob. 21TDCh. 5 - Prob. 1CATCh. 5 - Prob. 2CATCh. 5 - Prob. 3CATCh. 5 - Prob. 4CATCh. 5 - Prob. 5CATCh. 5 - Prob. 6CATCh. 5 - Repeat Exercise 6, but this time use the EXISTS...Ch. 5 - Prob. 8CATCh. 5 - Prob. 9CATCh. 5 - Prob. 10CATCh. 5 - Prob. 11CATCh. 5 - Prob. 12CATCh. 5 - Prob. 13CATCh. 5 - Prob. 14CATCh. 5 - Prob. 15CATCh. 5 - Prob. 16CATCh. 5 - Prob. 17CATCh. 5 - Prob. 18CATCh. 5 - Prob. 1SCGCh. 5 - Prob. 2SCGCh. 5 - Prob. 3SCGCh. 5 - Prob. 4SCGCh. 5 - Repeat Exercise 4, but this time use the EXISTS...Ch. 5 - Prob. 6SCGCh. 5 - Prob. 7SCGCh. 5 - Prob. 8SCGCh. 5 - Prob. 9SCGCh. 5 - Prob. 10SCGCh. 5 - Prob. 11SCGCh. 5 - Prob. 12SCGCh. 5 - Prob. 13SCGCh. 5 - Prob. 14SCGCh. 5 - Prob. 15SCGCh. 5 - Prob. 16SCG
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