PG数据库在手动收集表统计信息的时候想要增加统计信息的准确度，以下哪些命令可以实现？ A alter table tab_name alter column col_name set (n_distinct_inherited=xxx); B alter table tab_name alter column col_name set (n_distinct=xxx); C alter table tab_name alter column col_name set statistics xxx; D set default_statistics_target to xxx; 这个答案不应该是ABCD? https://blog.csdn.net/Hehuyi_In/article/details/94457923