While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?()
A. It updates the existing SQL profiles with current statistics
B. It makes the statistics information available to GATHER_STATS_JOB
C. It initiates the statistics collection process by running GATHER_STATS_JOB
D. It logs a warning message in the alert log so that the DBA can perform statistics collection manually
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芦荟宜入丸散,不入煎剂。()
A. 正确
B. 错误
()是指在实践中将科学化的管理理论具体化为可操作的管理方法、管理技巧和管理手段,通过一定的技巧和诀窍来达到管理的预期目标。
影响领导有效性的因素有:(1)领导者的品质;(2)领导者的领导方式;(3)领导情景因素;(4)()。