通常，数据库问题可能是指由数据库导致的任何瓶颈问题，包括SQL查询、数据库优化参数、索引问题和数据分布问题。
Generally, database problems can refer to any bottleneck due to database, including SQL queries, database tuning parameters, indexing issues, and data distribution problems.
对于残缺的样本观测数据，讨论了正态分布总体尺度参数的区间估计问题。
A question of formation confidence interval for scale parameter of normal distribution from incomplete observational data is discussed.
最后讨论了如何选择联合验前分布中的参数的问题，并给出了趋势检验方法。
At last, the problem of how to select the parameters of joint prior distribution is discussed and the trend testing approaches are given.
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