复制WITH T AS ( SELECT 1 ID,个高10 NUM UNION ALL SELECT 1,20 UNION ALL SELECT 1,30 UNION ALL SELECT 2,40 UNION ALL SELECT 2,50 UNION ALL SELECT 2,60 ) SELECT ID,NUM, LAG(NUM) OVER (PARTITION BY ID ORDER BY NUM) AS OneArgs, LAG(NUM,1) OVER (PARTITION BY ID ORDER BY NUM) AS TowArgs, LAG(NUM,2,0) OVER (PARTITION BY ID ORDER BY NUM) AS ThressArgs FROM T 1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.