Tài liệu SQL Antipatterns- P4 ppt
Tài liệu SQL Antipatterns- P4 ppt
... INDEX
Microsoft SQL Server ALTER INDEX REORGANIZE, ALTER INDEX REBUILD,
or DBCC DBREINDEX
MySQL ANALYZE TABLE or OPTIMIZE TABLE
Oracle ALTER INDEX REBUILD
PostgreSQL VACUUM or ANALYZE
SQLite VACUUM
How ... behavior of nul
l
in SQL. Unlike in most programming languages, SQL treats null as a
special value, different from zero, false, or an empty string. This is true
in standard SQL and m...
Tài liệu SQL Antipatterns- P3 ppt
... partitioning
support in MySQL version 5.1, you can specify partitions as an optional
part of a
CREATE TABLE statement.
Download Metadata-Tribbles/soln/horiz-partition .sql
CREATE TABLE Bugs (
bug_id ... data type for real numbers,
c
alled float or double. SQL supports a similar data type of the same
name. Many programmers naturally use the SQL FLOAT data type every-
where they need fracti...
Tài liệu SQL Antipatterns- P5 ppt
... com-
bine them all into a single pass would be a nightmare.
Writing SQL Automatically—with SQL
When you split up a complex SQL query, the result may be many simi-
l
ar queries, perhaps varying ... writing one SQL statement to solve his complex update, I wrote
a script to generate a set of simpler SQL statements that had the desired
effect:
Download Spaghetti-Query/soln/generate-upda...
Tài liệu SQL Antipatterns- P6 pptx
... See-No-Evil/anti/white-space.php
<?php
$sql = "SELECT
*
FROM Bugs";
if ($bug_id) {
$sql .= "WHERE bug_id = " . intval($bug_id);
}
$stmt = $pdo->prepare( $sql) ;
Why would the query in ... express in SQL are awkward in
A
ctive Record.
Some frameworks try to enhance Active Record to support a
variety of SQL clauses. The more these enhancements expose
the fact t...
Tài liệu Exchange 2007 P4 pptx
... vsiclab.net v=spf1
ip4:192.168.2.200
Mở dnsmgmt.msc Î
Forward Lookup Zone Î
phải chuột trên zone name Î
New Other record Î Text
(TXT) Î Create Record
Exchange 2007 Tài liệu dành cho học viên ... : Get-ImapSettings
Exchange 2007 Tài liệu dành cho học viên
VSIC Education Corporation Trang 86
b. Vào service.msc để
start Microsoft
Exchange IMAP4
service lên.
c. Tạo thê...
Tài liệu SQL Antipatterns- P1 docx
... limited version
of the SQL language.
He said, “I don’t need to support the full language—that would be too
much work. I need only one SQL statement: SELECT.”
I
hadn’t been taught SQL in school. Databases ... related to data-
base programming. I recommend SQL Performance Tuning [
GP03] and
High Performance MySQL, Second Edition [
SZT
+
08]. Some of the topics
i
n SQL Antipatterns are...