Locks any row accessed by a transaction of an application while the cursor is positioned on the row.
在游标定位在行中时,锁定这个被应用程序的某个事务访问的任何一行。
The surrogate key values start with a number, for example "1", for the first row of the table, and is incremented by one for each row thereafter.
代理键的值从某一个数字开始,例如 "1",以这个数字作为该列在表中第一行的值,之后的每一行中该列的值都按 1 递增。
This can be done by using a timestamp or sequence number contained in the row, or by adding every column in the row to the WHERE clause of the UPDATE.
这可以通过使用数据行中包含的时间戳或序列号来进行,也可将数据行的每个列字段添加到UPDATE的where子句中。
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