SQL PROGRAMMING STYLE- P7 ppt

... used SQL/ PSM to mimic the classic COBOL program for this kind of summary. Without repeating a dozen columns again, a set-oriented solution is this: CREATE PROCEDURE SurveySummary() LANGUAGE SQL BEGIN DELETE ... original schema lacked keys and constraints that had to be added to give us this: 10.1 Bad Programming in SQL and Procedural Languages 187 but it at least follows the...

Ngày tải lên: 06/07/2014, 23:20

... following statement is the first impulse of most new SQL programmers, but it does not work. CREATE PROCEDURE IncreasePrices() LANGUAGE SQL DETERMINISTIC BEGIN UPDATE Books SET price = price ... CREATE TABLE Sequence (seq INTEGER NOT NULL PRIMARY KEY); CREATE PROCEDURE MakeSequence() LANGUAGE SQL DETERMINISTIC INSERT INTO Sequence (seq) SELECT hundred * 100 + ten * 10 + unit + 1 FR...

Ngày tải lên: 06/07/2014, 23:20

... table quickly collects garbage. CHAR(n) data often has advantages for access and storage in many SQL products. Numeric encodings can take advantage of arithmetic operators for ranges, check digits, ... CHECK (CASE WHEN code_type = <type 1> AND <validation 1> THEN 1 —assume that your SQL product can support a huge CASE expression WHEN code_type = <type n> 5.3 Gen...

Ngày tải lên: 06/07/2014, 23:20

... example of having a column in a table change domain on the fly on September 29, 2004, on the SQL Server programming newsgroup. His goal was to keep football statistics; this is a simplification ... show about Bell Labs inventing C++ and OO programming for us, and we got to ask questions. One of the questions was how we should put OO stuff into SQL. His answer was that Bell Labs, w...

Ngày tải lên: 06/07/2014, 23:20

... combination of MOLAP and ROLAP). Details of vari- ous modes are beyond this book’s scope. A Transact -SQL (T -SQL) query against the AdventureWorks DW database to get a summary by country would look like ... Project. Models can be generated against SQL Server or Analysis Services. NOTE Model Designer and, subsequently, Report Builder can only build reports against SQL Server or Analysis...

Ngày tải lên: 14/12/2013, 16:15

... of SQL Server, extents correspond to SQL tables. Types in M will map to table definitions in T -SQL, but do not result in actually creating the tables in SQL Server. Code that results in a T -SQL ... successfully create the T -SQL code for generating the schema and table definition on the SQL Server side of the house. Generating T -SQL Code for the Car Model To generate the T...

Ngày tải lên: 21/01/2014, 08:20

... programmers. My goals in this book are to improve SQL programming style and proficiency. To be more exact: 1. To help an individual programmer write Standard SQL without an accent or a dialect . ... other SQLs, cannot be easily understood by an end user, and cannot be expanded. In the second case, what some newbies, who are still thinking in terms of second- and third-generati...

Ngày tải lên: 10/04/2014, 09:40

Ngày tải lên: 06/07/2014, 23:20

... tables, 63 SQL 4GLs, 151, 152 bad programming in, 184–89 as declarative language, 193 Dynamic, 168–70 injection, 169–70 Standard, 4, 5, 6, 7, 118 testing, 130–31 thinking in, 183–95 SQL- 92 CASE ... 3 quoted identifiers, 5 string operators, 108 SQL- 99, 3 Stamp coupling, 156 Standard functions, 108 Standard Industrial Classification (SIC), 14 Standard SQL case-sensitivity rules, 6, 7...

Ngày tải lên: 06/07/2014, 23:20

... system, 89–90 Display, 96 Domain-Key Normal Form (DKNF), 62–63 DROP TABLE statement, 67 Dynamic SQL, 168–70 purpose, 168 in stored procedures, 169 E Electronic data interchange (EDI) files,

Ngày tải lên: 06/07/2014, 23:20