在 SELECT 中使用 FILTER 的 SQL GROUP BY

Question

如果我有以下示例数据:

╔══════════════╦══════════════════╦════════════╦═══════╗
║    Client    ║      con_id      ║ mat1_07_03 ║ Ccode ║
╠══════════════╬══════════════════╬════════════╬═══════╣
║ Clients Name ║ C13109BBFD511534 ║ $1,062.00  ║ NOFL  ║
║ Clients Name ║ C11AC9BBF74D6882 ║ $879.73    ║ NOFL  ║
║ Clients Name ║ C12A69BBF1ACB578 ║ $2,790.29  ║ NOFA  ║
║ Clients Name ║ C12A69BBF1ACB578 ║ $912.00    ║ NOFL  ║
║ Clients Name ║ C6B0CA1A767C9744 ║ $2,180.11  ║ NOFL  ║
║ Clients Name ║ C11AC9BBF74D6882 ║ $878.67    ║ NOFA  ║
║ Clients Name ║ C13B79BBF4F1F450 ║ $300.00    ║ NOFL  ║
║ Clients Name ║ C12A69BBF1ACB578 ║ $1,790.67  ║ NOFL  ║
║ Clients Name ║ CA6869E2FE38A449 ║ $240.00    ║ NOFA  ║
║ Clients Name ║ C46439FB0D847140 ║ $3,392.66  ║ NOFL  ║
║ Clients Name ║ C12A69BBF1ACB578 ║ $1,791.73  ║ NOFA  ║
║ Clients Name ║ C13B49BBF12ED236 ║ $0.00      ║ NOFL  ║
║ Clients Name ║ C12A69BBF1ACB578 ║ $879.73    ║ NOFL  ║
╚══════════════╩══════════════════╩════════════╩═══════╝

并应用以下查询:

SELECT 
     [Client]=MAX(m.Client)
    ,[CaseCount]=COUNT(m.con_id)
    ,[AmtInDispute]=CONVERT(char, SUM(Convert(money, m.mat1_07_03)), 101)
FROM lntmu11.matter m
GROUP BY m.con_id
ORDER BY COUNT(m.Client) DESC

我如何进一步对 Ccode 列进行分组以获得 COUNT 行数NOFA 或 NOFL

我想要的输出将显示为:

╔══════════╦═══════════╦═══════════════╦═══════════════╦══════════════╗
║  Client  ║ CaseCount ║ NOFACaseTotal ║ NOFLCaseTotal ║ AmtInDispute ║
╠══════════╬═══════════╬═══════════════╬═══════════════╬══════════════╣
║ Client A ║      3548 ║          2000 ║          1548 ║ 5,658,307.60 ║
║ Client B ║      3366 ║           100 ║          3266 ║ 2,885,649.48 ║
║ Client C ║      3014 ║           800 ║          2214 ║ 2,851,507.13 ║
║ Client D ║      2340 ║           340 ║          2000 ║ 3,467,207.12 ║
╚══════════╩═══════════╩═══════════════╩═══════════════╩══════════════╝

Answer 1

只需使用条件聚合:

SELECT m.Client, CaseCount = COUNT(m.con_id),
       CONVERT(varchar(255), SUM(Convert(money, m.mat1_07_03)), 101) as AmtInDispute
       sum(case when cCode = 'NOFA' then 1 else 0 end) as NOFACaseTotal,
       sum(case when cCode = 'NOFL' then 1 else 0 end) as NOFLCaseTotal,
FROM lntmu11.matter m
GROUP BY m.client
ORDER BY COUNT(m.Client) DESC;

注意:在对字符进行转换时，始终包括长度(在 T-SQL 中)。