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

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Changing DataAbsolutely everything involving SELECTstatements is supposed to be passive. Nomatter what sort of SELECT statement yourun, it should never affect the data in theunderlying tables.We will now cover statements that DOaffect the data in the underlying tables.
The INSERT VerbThe easiest way to add new data to a table iswith an INSERT statement. You will dothis a lot from within Active Server Pages.Essentially, what you do is build up anINSERT statement by string concatenationfrom the data values you collect. Whenfinished, you execute the INSERTstatement and the data goes into the table.
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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
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Aggregate FunctionsSince the name w
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Aggregate FunctionsIn general, you
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Aggregate FunctionsFunction UseAppl
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Aggregate FunctionsIf all we could
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Aggregate FunctionsYou do not have
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GroupingIn the first query, the sum
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GroupingIncidentally, the above is
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JOIN CLAUSES
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The JOIN ClauseJoins usually make u
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Design StrategiesThis is generally
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The JOIN ClauseThe join key or comm
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The JOIN ClauseThe above query will
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Speeding Things UpWe could have wri
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Relationships among TablesThe way w
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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 and 64: Using JOIN and WHEREHere, the sort
Page 65 and 66: Compound JoinsFinal ResultsResults
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: INSERT STATEMENTS
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
Page 117 and 118: SQL TransactionsA critically import
Page 119 and 120: SQL TransactionsIt would be disastr
Page 121 and 122: SQL TransactionsIn SQL, it might lo
Page 123 and 124: SQL TransactionsThe opposite of a C
Page 125 and 126: CONCLUSIONS
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