sql - 在有重复时仅选择最新记录的 SQL(SCCM 数据库)中的查询
问题描述
LastLogin
如果BIOSSerialNumber
重复,我需要修改以下查询以仅选择最新的记录。我已经尝试过类似问题(row_number(),子查询,...)中提出的解决方案,但我无法使其工作。
这是对 SCCM 数据库的 SQL 查询:
SELECT
v_GS_COMPUTER_SYSTEM.Name0 as name,
v_GS_COMPUTER_SYSTEM_PRODUCT.Version0 as model,
v_GS_COMPUTER_SYSTEM.ResourceID,
v_GS_SYSTEM.SystemRole0 as SystemRole,
v_GS_OPERATING_SYSTEM.Caption0 as caption,
v_GS_SYSTEM_ENCLOSURE.ChassisTypes0 as chassistype,
v_GS_WORKSTATION_STATUS.LastHWScan,
v_GS_PC_BIOS.SerialNumber0 as BIOSSerialNumber,
v_GS_COMPUTER_SYSTEM_PRODUCT.UUID0 as UUIDSerialNumber,
v_GS_SYSTEM_ENCLOSURE.SerialNumber0 as ChassisSerialNumber,
v_GS_BASEBOARD.SerialNumber0 as BaseboardSerialNumber,
v_R_SYSTEM.Last_Logon_Timestamp0 as LastLogin
FROM v_GS_COMPUTER_SYSTEM
LEFT JOIN v_GS_WORKSTATION_STATUS ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_WORKSTATION_STATUS.ResourceID
LEFT JOIN v_GS_SYSTEM ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_SYSTEM.ResourceID
LEFT JOIN v_GS_PC_BIOS ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_PC_BIOS.ResourceID
LEFT JOIN v_GS_OPERATING_SYSTEM ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_OPERATING_SYSTEM.ResourceID
LEFT JOIN v_GS_COMPUTER_SYSTEM_PRODUCT ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_COMPUTER_SYSTEM_PRODUCT.ResourceID
LEFT JOIN v_GS_SYSTEM_ENCLOSURE ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_SYSTEM_ENCLOSURE.ResourceID
LEFT JOIN v_GS_BASEBOARD ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_BASEBOARD.ResourceID
LEFT JOIN v_R_SYSTEM ON v_GS_COMPUTER_SYSTEM.ResourceID = v_R_SYSTEM.ResourceID
如果结果是:
name model ResourceID … BIOSSerialNumber … LastLogin
ABC-123 HP XYZ 567845678 … SerialNumber1 … 2020-10-26 21:14:28.000
DEF-456 HP XYZ 984567432 … SerialNumber1 … 2020-10-24 07:32:05.000
EFG-789 HP XYZ 127687643 … SerialNumber2 … 2020-10-21 08:35:05.000
我只需要返回第 1 行和第 3 行,因为第 2 行的 BIOSSerialNumber 与 1 相同,但 LastLogin 较旧:
name model ResourceID … BIOSSerialNumber … LastLogin
ABC-123 HP XYZ 567845678 … SerialNumber1 … 2020-10-26 21:14:28.000
EFG-789 HP XYZ 127687643 … SerialNumber2 … 2020-10-21 08:35:05.000
有什么办法可以实现吗?提前谢谢了。
解决方案
使用 row_number 函数,如果您按 BIOSSerialNumber 分区并按 LastLogin 排序,如下所示:
;with cte_SCCM as
(
SELECT
v_GS_COMPUTER_SYSTEM.Name0 as name,
v_GS_COMPUTER_SYSTEM_PRODUCT.Version0 as model,
v_GS_COMPUTER_SYSTEM.ResourceID,
v_GS_SYSTEM.SystemRole0 as SystemRole,
v_GS_OPERATING_SYSTEM.Caption0 as caption,
v_GS_SYSTEM_ENCLOSURE.ChassisTypes0 as chassistype,
v_GS_WORKSTATION_STATUS.LastHWScan,
v_GS_PC_BIOS.SerialNumber0 as BIOSSerialNumber,
v_GS_COMPUTER_SYSTEM_PRODUCT.UUID0 as UUIDSerialNumber,
v_GS_SYSTEM_ENCLOSURE.SerialNumber0 as ChassisSerialNumber,
v_GS_BASEBOARD.SerialNumber0 as BaseboardSerialNumber,
v_R_SYSTEM.Last_Logon_Timestamp0 as LastLogin,
ROW_NUMBER() OVER (PARTITION BY v_GS_PC_BIOS.SerialNumber0 ORDER BY v_R_SYSTEM.Last_Logon_Timestamp0 DESC) as RN
FROM v_GS_COMPUTER_SYSTEM
LEFT JOIN v_GS_WORKSTATION_STATUS ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_WORKSTATION_STATUS.ResourceID
LEFT JOIN v_GS_SYSTEM ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_SYSTEM.ResourceID
LEFT JOIN v_GS_PC_BIOS ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_PC_BIOS.ResourceID
LEFT JOIN v_GS_OPERATING_SYSTEM ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_OPERATING_SYSTEM.ResourceID
LEFT JOIN v_GS_COMPUTER_SYSTEM_PRODUCT ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_COMPUTER_SYSTEM_PRODUCT.ResourceID
LEFT JOIN v_GS_SYSTEM_ENCLOSURE ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_SYSTEM_ENCLOSURE.ResourceID
LEFT JOIN v_GS_BASEBOARD ON v_GS_COMPUTER_SYSTEM.ResourceID = v_GS_BASEBOARD.ResourceID
LEFT JOIN v_R_SYSTEM ON v_GS_COMPUTER_SYSTEM.ResourceID = v_R_SYSTEM.ResourceID
)
SELECT *
FROM cte_SCCM
WHERE RN = 1
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