It should be noted that there are situations where the for UPDATE clause is not available for a given SELECT statement.

需要注意的是，在某些情况下给定的select语句不能使用FOR update子句。

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You should update your common language runtime (CLR) to the current version as it is not guaranteed to work with earlier versions.

应将公共语言运行时 （CLR） 更新到当前版本，因为不能保证早期版本也适用。

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