在db2数据库上的SQL中查询

Question

我正在使用此查询：

select substr("Message_Time",6,2) || '/' || substr("Message_Time",4,2) || '/' || '20'|| substr("Message_Time",2,2) || substr("Message_Time",8,2) || ':' || substr("Message_Time",10,2) as "Date",
       count(*) as "Fault", "Message_Location", "Service_Name_U", "Operation_Name_U", "Port_Namespace_U", 
      "Error_Code_U", "Error_SubCode_U", "Fault_Code_U", "Fault_String_U",
       "Requester_Identity", "Application_ServerName_U"
from "Fault_Log_Table_610"
where "Message_Time" >= 1181016220000000 and "Message_Time" < 1181017220000000 and
      "Operation_Name_U" = 'getDomandeDisabile'
group by substr("Message_Time", 6, 2) || '/' || substr("Message_Time", 4, 2)  || '/' || '20'|| substr("Message_Time", 2, 2) || substr("Message_Time",8,2) || ':' || substr("Message_Time",10,2), 
       "Service_Name_U", "Operation_Name_U", "Error_Code_U", "Error_SubCode_U", "Message_Location", "Fault_Code_U", "Fault_String_U",
       "Port_Namespace_U", "Requester_Identity", "Application_ServerName_U"

我需要在“日期”字段中添加2小时，换句话说，我需要在substr（“ Message_Time”，8,2）中添加数字2。

日期格式为1181020164532000，其中：

第一个数字是世纪，然后是两个数字是年，然后是两个数字是月，然后是两个数字是天，然后是两个数字是小时，然后是两个数字是分钟，最后三个是毫秒

Answer 1

我将预先计算时间戳解析，然后将2小时添加到CTE（公用表表达式）中。

然后，我将在您想要的查询中使用这些现成的数据。 就像是：

with x as (
select
    timestampadd(8, 2, -- add 2 hours
      timestamp_format( -- parse the VARCHAR into a TIMESTAMP
                       '20' || substr("Message_Time",2,15) || '000',
                       'YYYYMMDDHHMISSNNNNNN')
    ) as "Date",
    "Message_Location", "Service_Name_U", 
    "Operation_Name_U", "Port_Namespace_U", 
    "Error_Code_U", "Error_SubCode_U", "Fault_Code_U", "Fault_String_U",
    "Requester_Identity", "Application_ServerName_U"
from "Fault_Log_Table_610"
where "Message_Time" >= 1181016220000000
  and "Message_Time" < 1181017220000000
  and "Operation_Name_U" = 'getDomandeDisabile'
)
select
    "Date",
    count(*) as "Fault",
    "Message_Location", "Service_Name_U", 
    "Operation_Name_U", "Port_Namespace_U", 
    "Error_Code_U", "Error_SubCode_U", "Fault_Code_U", "Fault_String_U",
    "Requester_Identity", "Application_ServerName_U"
from x
group by "Date", 
    "Service_Name_U", "Operation_Name_U", "Error_Code_U", "Error_SubCode_U",
    "Message_Location", "Fault_Code_U", "Fault_String_U",
    "Port_Namespace_U", "Requester_Identity", "Application_ServerName_U"