SQL PROGRAMMING STYLE- P20 ppsx
SQL PROGRAMMING STYLE- P20 ppsx
... particular SQL products that can suggest indexes based on the actual statements submitted to the SQL engine. Consider using one. 6.9 Avoid Correlated Subqueries Rationale: In the early days of SQL, ... is a SQL/ PSM standard, in the real world, only Mimer and IBM have implemented it at the time of this writing. Instead, each vendor has a proprietary 4GL, such as T -SQL for the Syba...
Ngày tải lên: 06/07/2014, 23:20
SQL PROGRAMMING STYLE- P3 ppsx
... 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
SQL PROGRAMMING STYLE- P24 ppsx
... and Centura (née Gupta) lets you pick which one to use—the worst of both nonstandard worlds! In SQL- 92, you have a choice and can force the order of execution. Either do the predicates after
Ngày tải lên: 06/07/2014, 23:20
SQL PROGRAMMING STYLE- P29 ppsx
... will need for your smallest units . In most SQL implementations, rounding and truncation will improve with more decimal places. The downside of SQL is that precision and the rules for truncation ... that only the allowed values appear in the database . If you have the CREATE DOMAIN feature of SQL- 92, use it to build your scales. Nominal scales would have a list of possible val...
Ngày tải lên: 06/07/2014, 23:20
SQL PROGRAMMING STYLE- P42 ppsx
... There was also a series of articles at: http://www.sqlservercentral.com/columnists/sjones/ codingstandardspart2formatting.asp http://www.sqlservercentral.com/columnists/sjones/ codingstandardspart1formatting.asp ... will see “usp_” for user-defined stored procedures, “trig_” for triggers, and so forth. In MS SQL Server, this is a serious problem, because the prefix “sp_” is used for s...
Ngày tải lên: 06/07/2014, 23:20
sql programming style - apr 2005
... 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
SQL PROGRAMMING STYLE- P2 potx
... 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