index of qtsdk
Here is a list of what package each GNU program or library is in. - ........................ rc -- ....................... rc --p ...................... rc -p ....................... rc .gitaction .............. git 4dview ............. geomview a2p .................... perl a2x .................... xopt ac ..................... acct accton ................. acct aclocal ............ automake acm ...
by qingfenglala - Linux文档专区 - 2009-08-20 13:03:25 阅读（1029） 回复（0）
我运行： USE NorthWind GO SELECT companyname, contactname, city, country, phone FROM customers order by companyname companyname, contactname, city, country, phone 是一个名字叫contact的non-cluster index, 当有order by 语句的时候，excution plan 用的是contact index来scan index.当没有order by 的时候为什么用的是主键(PK)来查询(scan)呢？
.... -- ============================================================ -- Table: XXX -- ============================================================ create table XXX ( USER_ID INTEGER not null , LOCALE_ID INTEGER not null , CREATE_BY VARGRAPHIC(60) ...
我看ocp 教材上写bitmap index efficient for queries using or predicates. 可是我怎么也想不明白为什么?那位大哥能解释一下. 我在线等!!!!!!!!!
各位好，我是一位新手，希望得到大家的帮助。 在测试index命令时，有一点不解，例： #!/usr/bin/perl -w index " a boy","boy"; 执行后提示： useless use of index in void context at ii.pl line 2. 这里上下文怎么是无效？ 求解，谢谢！
IF my sql query does not know how to pick up the index which i created earlier then what should i do???
I wish to know how I going to know am I create a correct index? Can any provide some examples for creating a proper index? THANKS...
powerdesigner 检查模板时大量报告: existence of index 信息,请问是什么意思?怎么解决? 另: powerdesigner 中怎样建主外键(除了拖动指向)? 缺省命名如:Reference_18有必要改成规范的命名吗?
select acct_id,sum(charge) from acct_item where acct_id in ( select acct_id from tmp_62) and state in ('20C','20T') group by acct_id; 这个语句如果不加任何提示不会用上索引，执行得很慢。 SELECT /*+ index(acct_item,idx_acct_item_acct) */ acct_id, SUM (charge) FROM acct_item WHERE acct_id IN ( SELECT acct_id FROM tmp_62) AND state IN ('20C', '20T') GROUP BY acct_id 如果加了索引提示就能使用...
