oracle exclusive lock 相關文章
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Exclusive locks are used when the programmer desired exclusive control over a set of rows until their operation has comp...
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When a statement modifies data, its transaction holds an exclusive lock on data that prevents other transactions from ac...
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Several transactions can acquire shared locks on the same resource. An exclusive lock ensures that there is no more than...
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The LOCK TABLE statement allows you to explicitly acquire a shared or exclusive table lock on the specified table. The t...
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ROW SHARE permits concurrent access to the locked table but prohibits users from locking the entire table for exclusive ...
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一般而言,共享鎖定(Share Lock) 比互斥鎖定(Exclusive Lock) 具有更高的資料並行性(Data Concurrency)。在多使用者資料庫系統使用鎖定法(Locks),有時會產生死結(Dead ...
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oracle 10g支援手動與自動lock,自動lock會鎖定有 ... LOCK TABLE employee IN EXCLUSIVE MODE. (EXCLISIVE ... ROW EXCLUSIVE: 與ROW SHARE相同,但...
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Only one session can take an exclusive lock on a row, or a whole table, at a time. -- First session. UPDATE hr.employees...
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2013年4月10日 — Exclusive lock : Only one user/connection are allow to change the data. Update lock : Rows are locked til...
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Exclusive. If a session needs to modify a simple object, then an exclusive lock is required on the resource to prevent a...
oracle exclusive lock 參考影音
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