tailieunhanh - Joe Celko s SQL for Smarties - Advanced SQL Programming P83

Joe Celko s SQL for Smarties - Advanced SQL Programming P83. In the SQL database community, Joe Celko is a well-known columnist and purveyor of valuable insights. In Joe Celko's SQL for Smarties: Advanced SQL Programming, he picks up where basic SQL training and experience leaves many database professionals and offers tips, techniques, and explanations that help readers extend their capabilities to top-tier SQL programming. Although Celko denies that the book is about database theory, he nevertheless alludes to theory often to buttress his practical points. This title is not for novices, as the author points out. Instead, its intended. | 792 INDEX defined 449 for numeric values 449 with scalar subqueries 454 for strings 449 for temporal data types 449 Median 512-27 Celko s first 514-16 Celko s second 517-19 Celko s third 522-26 as central tendency measure 513 with characteristic function 520- 22 Date s first 513-14 Date s second 516 defined 512 defining 523 financial 521 Henderson s 526-27 Murchison s 516-17 statistical 512 520 Vaughan s with views 519-20 See also Statistics MERGE statement 232-34 correlation name 233 syntax 233 Metaphone 177-81 defined 177 Pascal version 177-81 See also Phonetic matching MIN function 349 449-50 defined 449 for numeric values 449 for strings 450 for temporal data types 449-50 Minimum subsets 620 Missing tables 187 Missing times in contiguous events 652-56 end date 653 655 start date 653 655 See also Time s Missing values 187-90 in columns 187-89 context and 189-90 multiple 199 See also Values Modes 510-12 changes 511 defined 510 derived tables for 512 multiple 510 MOD function 114-15 computation 605 odd even determination 472 Modifications audit log 164 bitemporal tables 165-66 current 146-50 nonsequenced 155 sequenced 150-55 Moreno Francisco 364 Multiple aggregation levels 431-35 CASE expressions for 434-35 grouped views for 432 intent 431 subquery expressions for 433-34 Multiple column data elements 201-9 currency conversion 205-6 distance functions 201-2 IP address storage 202-5 rational numbers 209 Social Security numbers 206-9 Multiple criteria extrema functions 460-62 forms 461 ordering 461 Multiple parameter auxiliary tables 488-89 Multiple translation auxiliary tables 487-88 Multivalued dependencies MVDs 75 76 INDEX 793 Multivariable descriptive statistics 546-48 covariance 546-47 NULLs in 548 Pearson s r 547 Murchison s median 516-17 N Named columns 576-79 Names column 5 SQL 5-6 table 5 use guidelines 5-6 NaN Not a Number 103 NATURAL JOINS 327 Natural keys 89 nchar data type 169 Negative values 114 Nested exists 410 Nested parenthesis 565 Nested queries .

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