大约有 46,000 项符合查询结果(耗时:0.0289秒) [XML]

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Remove duplicates in the list using linq

... var distinctItems = items.GroupBy(x => x.Id).Select(y => y.First()); share | improve this answer | follow | ...
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MySQL Select Query - Get only first 10 characters of a value

... Using the below line SELECT LEFT(subject , 10) FROM tbl MySQL Doc. share | improve this answer | follow ...
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Disable ONLY_FULL_GROUP_BY

...ove ONLY_FULL_GROUP_BY from mysql console mysql > SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY','')); you can read more here Solution 2: Remove ONLY_FULL_GROUP_BY from phpmyadmin Open phpmyadmin & select localhost Click on menu Variables & scroll down for sq...
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How do you debug MySQL stored procedures?

...E debug_msg(enabled INTEGER, msg VARCHAR(255)) BEGIN IF enabled THEN select concat('** ', msg) AS '** DEBUG:'; END IF; END $$ CREATE PROCEDURE test_procedure(arg1 INTEGER, arg2 INTEGER) BEGIN SET @enabled = TRUE; call debug_msg(@enabled, 'my first debug message'); call debug_msg(@ena...
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Remove duplicate rows in MySQL

...ate temporary table tmpTable (id int); insert into tmpTable (id) select id from YourTable yt where exists ( select * from YourTabe yt2 where yt2.title = yt.title and yt2.company = yt.company and yt2.site_id = yt.si...
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jQuery select by attribute using AND and OR operators

I'm thinking about, if it is possible in jQuery to select elements by named attributes using AND and OR. 8 Answers ...
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Drop data frame columns by name

...op=FALSE to keep R from converting your data frame to a vector if you only select a single column. Don't forget that data frames are lists, so list selection (one-dimensional like I did) works perfectly well and always returns a list. Or a data frame in this case, which is why I prefer to use it. ...
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Select a Dictionary with LINQ

I have used the "select" keyword and extension method to return an IEnumerable<T> with LINQ, but I have a need to return a generic Dictionary<T1, T2> and can't figure it out. The example I learned this from used something in a form similar to the following: ...
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SQLAlchemy IN clause

...3,456))).all() edit: Without the ORM, it would be session.execute( select( [MyUserTable.c.id, MyUserTable.c.name], MyUserTable.c.id.in_((123, 456)) ) ).fetchall() select() takes two parameters, the first one is a list of fields to retrieve, the second one is the where ...
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How to set IntelliJ IDEA Project SDK

... for me to set up the Project SDK. When I click on "JDK" it asks for me to select the home directory of the JDK as shown in this image. ...