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sync_binlog=1 innodb_flush_log_at_trx_commit=1 innodb_flush_log_at_trx_commit和sync_binlog 两个参数是控制MySQL 磁盘写入策略以及数据安全性的关键参数 innodb_flush_log_at_trx_commit设置为1,每次事务提交时MySQL都会把log buffer的数据写入log file,并且刷到磁盘中去。 sync_binlog =N (N>0) ,MyS...
Duplicate data in table I read some answered questions but they don't help me! This is my table: I want prevent duplicate data if their student_id and les_id were equal. How can I do it, I don't have much info about triggers... ...
The Student t test was used for comparison between 2 groups. Analysis of variance was used for the comparison among the means of 3 or more groups, followed by the Tukey post-test, using GraphPad PRISM software (GraphPad Software, San Diego, CA). Differences were considered statistically signifi...
a大多数学生一周锻炼三次到四次 A majority student week exercises three times to four times[translate] amy weather-zh my weather-zh[translate] aImma say that I prefer them no clothes[translate] aPlease review up-coming requirements and submit one PO for the required items.[translate] ...
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