大约有 47,000 项符合查询结果（耗时：0.0526秒） [XML]
“Insert if not exists” statement in SQLite
... Perhaps adding ON CONFLICT IGNORE to CREATE TABLE would be a bit more handy
– defhlt
Apr 12 '15 at 13:44
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Can I get a list of files marked --assume-unchanged?
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69
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“Unknown class in Interface Builder file” error at runtime
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183
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“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
... ANSI SQL 2003 defines a MERGE statement that can solve the same need (and more), but MySQL does not support the MERGE statement.
A user tried to edit this post (the edit was rejected by moderators). The edit tried to add a claim that INSERT...ON DUPLICATE KEY UPDATE causes a new auto-increment ...
How to query SOLR for empty fields?
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90
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Save PL/pgSQL output from PostgreSQL to a CSV file
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535
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Entity Framework rollback and remove bad migration
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131
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Remove Elements from a HashSet while Iterating [duplicate]
...de. See Becks book "Test Driven Development" or Fowler's "Refactoring" for more about factoring code.
– nash
Nov 4 '09 at 16:05
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How to put a line comment for a multi-line command [duplicate]
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93
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Opening Vim help in a vertical split window
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To improve more: you can use cabbrev to redefine h as vert h: :cabbrev h vert h. Then every time you type :h, it will automatically expand to :vert h.
– Aaron Shen
Oct 18 '15 at 2:39
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