Module 13 (Introduction to SQL - Part 2).pdf

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Compound JoinsFinally, we can “cascade” our joins tocombine three or more tables.We do this by first setting up pairs of joins,then in turn join their results.The SQL can get a little messy, so usingautomatic tools like QueryBuilder in Accesshelps a lot.
Compound JoinsFinal ResultsResults from joining A and BJOINJOINResults from joining C and DJOINTable A Table B Table C Table D
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Whirlwind Tour of SQL, Part 2Web an
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AGGREGATE FUNCTIONS
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Aggregate FunctionsConsider this co
Page 7 and 8:
Aggregate FunctionsSince the name w
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Aggregate FunctionsIn general, you
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Aggregate FunctionsFunction UseAppl
Page 13 and 14: Aggregate FunctionsIf all we could
Page 15 and 16: Aggregate FunctionsYou do not have
Page 17 and 18: GroupingIn the first query, the sum
Page 19 and 20: GroupingIncidentally, the above is
Page 21 and 22: JOIN CLAUSES
Page 23 and 24: The JOIN ClauseJoins usually make u
Page 25 and 26: Design StrategiesThis is generally
Page 27 and 28: The JOIN ClauseThe join key or comm
Page 29 and 30: The JOIN ClauseThe above query will
Page 31 and 32: Speeding Things UpWe could have wri
Page 33 and 34: Relationships among TablesThe way w
Page 35 and 36: One-To-ManyOne-to-Many: The most li
Page 37 and 38: Showing RelationshipsIn the query w
Page 39 and 40: Showing RelationshipsNotice this re
Page 41 and 42: TYPES OF JOIN CLAUSES
Page 43 and 44: The INNER JOINThis is the default t
Page 45 and 46: The INNER JOINIn the above example,
Page 47 and 48: The LEFT JOINThe LEFT JOIN specifie
Page 49 and 50: The RIGHT JOINThe RIGHT JOIN specif
Page 51 and 52: The OUTER JOINThe OUTER or FULL JOI
Page 53 and 54: The OUTER JOINThis means possibly g
Page 55 and 56: The CROSS JOINThis is a very odd ty
Page 57 and 58: The CROSS JOINHowever, when running
Page 59 and 60: Using JOIN and WHEREOf course, we c
Page 61 and 62: Using JOIN and ORDER BYWe can also
Page 63: Using JOIN and WHEREHere, the sort
Page 67 and 68: Compound JoinsThis example produces
Page 69 and 70: Compound JoinsThe Sum(Ccur(...)) po
Page 71 and 72: Compound JOINsIn the JOIN section,
Page 73 and 74: The Self JOINThis is used to join a
Page 75 and 76: Non-Equi JOINsBut this will give us
Page 77 and 78: SubqueriesThis is a powerful techni
Page 79 and 80: SubqueriesThis example involves usi
Page 81 and 82: SubqueriesThe third example, involv
Page 83 and 84: SELECT … INTO StatementsEverythin
Page 85 and 86: SELECT … INTO StatementsThe list
Page 87 and 88: INSERT STATEMENTS
Page 89 and 90: The INSERT VerbThe easiest way to a
Page 91 and 92: The INSERT VerbWhere:• tablename
Page 93 and 94: INSERT ExampleEvery value given in
Page 95 and 96: INSERT ExampleAlso note that we nei
Page 97 and 98: The INSERT VerbBecause it is so use
Page 99 and 100: A Better ApproachOr… put the code
Page 101 and 102: Notes About INSERTThere are usually
Page 103 and 104: Notes about INSERTDEFAULT can be us
Page 105 and 106: The DELETE VerbThe DELETE verb is a
Page 107 and 108: The DELETE VerbHere is one that mig
Page 109 and 110: The DELETE VerbOften, you should gi
Page 111 and 112: The UPDATE VerbThe UPDATE command a
Page 113 and 114: UPDATE ExampleThis one might make m
Page 115 and 116:
UPDATE ExampleOf course this might
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SQL TransactionsA critically import
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SQL TransactionsIt would be disastr
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SQL TransactionsIn SQL, it might lo
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SQL TransactionsThe opposite of a C
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CONCLUSIONS
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