我正在使用SQL Server,并尝试从表中获取作为主键的ID的计数,并在创建日期按月进行日期截断,如下所示:Count (CASE MONTH (creation_date) WHEN 2 THEN id END) AS Feb,
Count (CASE MONTH(creation_date) WHEN
我有一张三栏的单子:player_a,player_b,result,其中player_a和player_b是代表比赛中不同球员的标准化字符串,结果不是'W‘,就是'L’。when result = 'W' THEN 1 END) as num_wins,
count(casewhen result = 'L' THEN 1 END) as num_lossA3:C, "SELECT A, B, count(<