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。

日期的格式为1181020164532000，其中：

第一个数字是世纪接下来的两个数字是年份然后是两个数字然后是两个数字然后是两个数字然后两个数字是分钟最后三个数字是毫秒

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。像这样：

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"

在db2数据库上的SQL中查询

1 个答案: