大约有 47,000 项符合查询结果(耗时:0.0408秒) [XML]

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SQL Server SELECT into existing table

I am trying to select some fields from one table and insert them into an existing table from a stored procedure. Here is what I am trying: ...
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Is there a way to make text unselectable on an HTML page? [duplicate]

...an HTML UI with some text elements, such as tab names, which look bad when selected. Unfortunately, it's very easy for a user to double-click a tab name, which selects it by default in many browsers. ...
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How do I modify fields inside the new PostgreSQL JSON datatype?

With postgresql 9.3 I can SELECT specific fields of a JSON data type, but how do you modify them using UPDATE? I can't find any examples of this in the postgresql documentation, or anywhere online. I have tried the obvious: ...
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How to write a foreach in SQL Server?

... the lines of a for-each, where I would like to take the Ids of a returned select statement and use each of them. 10 Answer...
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How to request a random row in SQL?

... See this post: SQL to Select a random row from a database table. It goes through methods for doing this in MySQL, PostgreSQL, Microsoft SQL Server, IBM DB2 and Oracle (the following is copied from that link): Select a random row with MySQL: SELE...
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How can I render a list select box (dropdown) with bootstrap?

...e box that bootstrap supports to render a "regular" defacto drop down list select box? That is, where the drop down box is a list of values and if selected populate the contents of the list box? ...
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How to select only date from a DATETIME field in MySQL?

...e a table in the MySQL database that is set up with DATETIME . I need to SELECT in this table only by DATE and excluding the time. ...
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Select n random rows from SQL Server table

I've got a SQL Server table with about 50,000 rows in it. I want to select about 5,000 of those rows at random. I've thought of a complicated way, creating a temp table with a "random number" column, copying my table into that, looping through the temp table and updating each row with RAND() , and ...
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How to automatically select all text on focus in WPF TextBox?

If I call SelectAll from a GotFocus event handler, it doesn't work with the mouse - the selection disappears as soon as mouse is released. ...
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Simple way to calculate median with MySQL

... In MariaDB / MySQL: SELECT AVG(dd.val) as median_val FROM ( SELECT d.val, @rownum:=@rownum+1 as `row_number`, @total_rows:=@rownum FROM data d, (SELECT @rownum:=0) r WHERE d.val is NOT NULL -- put some where clause here ORDER BY d.val ) ...