大约有 40,000 项符合查询结果(耗时:0.0180秒) [XML]

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SQL: capitalize first letter only [duplicate]

...t only for displaying and do not need the actual data in table to change: SELECT UPPER(LEFT(word,1))+LOWER(SUBSTRING(word,2,LEN(word))) FROM [yourtable] Hope this helps. EDIT: I realised about the '-' so here is my attempt to solve this problem in a function. CREATE FUNCTION [dbo].[CapitalizeFi...
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Fastest way to remove first char in a String

... random strings, that you pre-populated an array (list) with, and randomly select the element of that array (list). – ajeh Sep 9 '16 at 19:51 add a comment  ...
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Why should hash functions use a prime number modulus?

...er of buckets. This is convenient and saves having to search around or pre-select a prime number of the right magnitude. So you rely on the hash function not to use even multipliers, which is generally a safe assumption. But you can still get occasional bad hashing behaviours based on hash functions...
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How to change XAMPP apache server port?

... Yes its working in localhost:8012 but when i trying remotely with my ip address my-ip-address:8012 getting page not found error. – Sathishkumar Jul 2 '12 at 15:14 1 ...
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Concatenate multiple result rows of one column into one, group by another column [duplicate]

...Simpler with the aggregate function string_agg() (Postgres 9.0 or later): SELECT movie, string_agg(actor, ', ') AS actor_list FROM tbl GROUP BY 1; The 1 in GROUP BY 1 is a positional reference and a shortcut for GROUP BY movie in this case. string_agg() expects data type text as input. Other ...
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Use '=' or LIKE to compare strings in SQL?

... To see the performance difference, try this: SELECT count(*) FROM master..sysobjects as A JOIN tempdb..sysobjects as B on A.name = B.name SELECT count(*) FROM master..sysobjects as A JOIN tempdb..sysobjects as B on A.name LIKE B.name Comparing strings with '=' is muc...
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How to concatenate columns in a Postgres SELECT?

... an explicit coercion to text [...] Bold emphasis mine. The 2nd example (select a||', '||b from foo) works for any data types since the untyped string literal ', ' defaults to type text making the whole expression valid in any case. For non-string data types, you can "fix" the 1st statement by c...
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社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...监控”。 那一般网站会有什么限制呢? 一定时间内单IP访问次数,没有哪个人会在一段持续时间内过快访问,除非是随意的点着玩,持续时间也不会太长。可以采用大量不规则代理IP来模拟。 一定时间内单账号访问次数,这...
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Get original URL referer with PHP?

... try this (isset ($_SERVER['HTTP_CLIENT_IP']) ? $_SERVER['HTTP_CLIENT_IP'] : (isset ($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR'] ) ) ...
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Sockets: Discover port availability using Java

...ee = false; } return portFree; } EDIT: If all you're trying to do is select a free port then new ServerSocket(0) will find one for you. share | improve this answer | fo...