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...
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,
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
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...
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...
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...
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...