大约有 42,000 项符合查询结果(耗时:0.0370秒) [XML]

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GUI Tool for PostgreSQL [closed]

...t to know is there any GUI Tool for PostgreSQL just like SQLYog for MySql 2 Answers ...
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Simplest way to profile a PHP script

... all the data $select_query = "SELECT * FROM data_table"; $result = mysql_query($select_query); prof_flag("Retrieve data"); $rows = array(); $found_data=false; while($r = mysql_fetch_assoc($result)) { $found_data=true; $rows[] = $r; } prof_flag("Close DB"); ...
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SQL SELECT WHERE field contains words

...start, stop) AS ( SELECT 1, 1, CHARINDEX(@sep, @str) UNION ALL SELECT pn + 1, stop + 1, CHARINDEX(@sep, @str, stop + 1) FROM Pieces WHERE stop > 0 ) SELECT pn AS Id, SUBSTRING(@str, start, CASE WHEN stop &gt...
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INSERT … ON DUPLICATE KEY (do nothing)

... uses resources for the second action. Use INSERT IGNORE ..., Negative : MySQL will not show any errors if something goes wrong, so you cannot handle the errors. Use it only if you don’t care about the query. share ...
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Why does struct alignment depend on whether a field type is primitive or user-defined?

...32 1 instance 1 x So in actuality this is a more like an Union type that will get 8 byte aligned this time around (all of the paddings will be aligned with the parent struct). If it weren't then we would end up with 20 bytes and that's not optimal so the mem allocator will never al...
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What's an Aggregate Root?

...o properly use the repository pattern. The central concept of an Aggregate Root keeps coming up. When searching both the web and Stack Overflow for help with what an aggregate root is, I keep finding discussions about them and dead links to pages that are supposed to contain base definitions. ...
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SQL: How to perform string does not equal

... Just noticed that the <=> operator only exists in the MySQL world, for more info see what is <=> – Top-Master Apr 27 '19 at 6:18 ...
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How can I implement a tree in Python?

... self.right = None self.data = None You can use it like this: root = Tree() root.data = "root" root.left = Tree() root.left.data = "left" root.right = Tree() root.right.data = "right" If you need an arbitrary number of children per node, then use a list of children: class Tree: def...
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'console' is undefined error for Internet Explorer

...ine,timelineEnd,group,groupCollapsed,groupEnd,clear */ (function() { // Union of Chrome, Firefox, IE, Opera, and Safari console methods var methods = ["assert", "cd", "clear", "count", "countReset", "debug", "dir", "dirxml", "error", "exception", "group", "groupCollapsed", "groupEnd", "...
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Nginx — static file serving confusion with root & alias

...nswers to my confusions. There is a very important difference between the root and the alias directives. This difference exists in the way the path specified in the root or the alias is processed. In case of the root directive, full path is appended to the root including the location part, whereas...