大约有 47,000 项符合查询结果(耗时:0.0427秒) [XML]

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PadLeft function in T-SQL

... I believe this may be what your looking for: SELECT padded_id = REPLACE(STR(id, 4), SPACE(1), '0') FROM tableA or SELECT REPLACE(STR(id, 4), SPACE(1), '0') AS [padded_id] FROM tableA I haven't tested the syntax on the 2nd example. I'm not sure if that works 100%...
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Select row with most recent date per user

... Query: SQLFIDDLEExample SELECT t1.* FROM lms_attendance t1 WHERE t1.time = (SELECT MAX(t2.time) FROM lms_attendance t2 WHERE t2.user = t1.user) Result: | ID | USER | TIME | IO | ---------------------------...
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How to get multiple selected values of select box in php?

I have a html form which has a select list box from which you can select multiple values because its multiple property is set to multiple. Consider form method is 'GET'. The html code for the form is as follows: ...
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Is it possible to specify condition in Count()?

...an use the fact that the count aggregate only counts the non-null values: select count(case Position when 'Manager' then 1 else null end) from ... You can also use the sum aggregate in a similar way: select sum(case Position when 'Manager' then 1 else 0 end) from ... ...
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Tri-state Check box in HTML?

...lternative would be to play with the checkbox transparency for the "some selected" state (as Gmail does used to do in previous versions). It will require some javascript and a CSS class. Here I put a particular example that handles a list with checkable items and a checkbox that allows to se...
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HTML select form with option to enter custom value

...users can enter custom text value or choose from drop down. A regular <select> only offers drop down options. 6 Ans...
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Multiple select statements in Single query

... SELECT ( SELECT COUNT(*) FROM user_table ) AS tot_user, ( SELECT COUNT(*) FROM cat_table ) AS tot_cat, ( SELECT COUNT(*) FROM course_table ) AS tot_course ...
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How to do a FULL OUTER JOIN in MySQL?

...MPLE transcribed from this SO question you have: with two tables t1, t2: SELECT * FROM t1 LEFT JOIN t2 ON t1.id = t2.id UNION SELECT * FROM t1 RIGHT JOIN t2 ON t1.id = t2.id The query above works for special cases where a FULL OUTER JOIN operation would not produce any duplicate rows. The quer...
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Unioning two tables with different number of columns

... Add extra columns as null for the table having less columns like Select Col1, Col2, Col3, Col4, Col5 from Table1 Union Select Col1, Col2, Col3, Null as Col4, Null as Col5 from Table2 share | ...
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overlay two images in android to set an imageview

... You can skip the complex Canvas manipulation and do this entirely with Drawables, using LayerDrawable. You have one of two choices: You can either define it in XML then simply set the image, or you can configure a LayerDrawable dynamically in code. Solution #1 (via XM...