SSIS 获取时间表达式

SSIS表达式 1.计算某个字符串中,某个子字符串出现的次数 Liang.liang.liang.liang 字符串中”.”出现的次数 设字符串变量为v_str SQL code LEN (@ [ 用户::v_str ] ) - ( LEN ( REPLACE (@ [ 用户::v_str ] ,".","")) / LEN ("."))

 

2.如果当前日期是周六日.则返回字符串”休息”,否则返回字符串”工作”

SQL code

   
     

    
      
    
      DATEPART
    
      ("weekday",
    
      GETDATE
    
      ()) 
    
      ==
    
       
    
      7
    
       
    
      ||
    
       
    
      DATEPART
    
      ("weekday",
    
      GETDATE
    
      ()) 
    
      ==
    
       
    
      1
    
       ? "休息" : "工作"
   
     

3.返回日期格式
 yyyy-MM-dd HH:mm:ss

SQL code

   
     

    
      
    
      (DT_WSTR,
    
      4
    
      )
    
      YEAR
    
      (
    
      GETDATE
    
      ()) 
    
      +
    
       "
    
      -
    
      " 
    
      +
    
       
    
      RIGHT
    
      ("
    
      00
    
      "
    
      +
    
      (DT_WSTR,
    
      2
    
      )
    
      MONTH
    
      (
    
      GETDATE
    
      ()),
    
      2
    
      ) 
    
      +
    
       "
    
      -
    
      " 
    
      +
    
       
    
      RIGHT
    
      ("
    
      00
    
      "
    
      +
    
      (DT_WSTR,
    
      2
    
      )
    
      DAY
    
      (
    
      GETDATE
    
      ()),
    
      2
    
      ) 
    
      +
    
       " " 
    
      +
    
       
    
      RIGHT
    
      ("
    
      00
    
      "
    
      +
    
      (DT_WSTR,
    
      2
    
      )
    
      DATEPART
    
      ("hour",
    
      GETDATE
    
      ()),
    
      2
    
      ) 
    
      +
    
       ":" 
    
      +
    
       
    
      RIGHT
    
      ("
    
      00
    
      "
    
      +
    
      (DT_WSTR,
    
      2
    
      )
    
      DATEPART
    
      ("minute",
    
      GETDATE
    
      ()),
    
      2
    
      ) 
    
      +
    
       ":" 
    
      +
    
       
    
      RIGHT
    
      ("
    
      00
    
      "
    
      +
    
      (DT_WSTR,
    
      2
    
      )
    
      DATEPART
    
      ("second",
    
      GETDATE
    
      ()),
    
      2
    
      )
   
     

MM/dd/yyyy

SQL code

   
     

    
      
    
      RIGHT
    
      ("
    
      00
    
      "
    
      +
    
      (DT_WSTR,
    
      2
    
      )
    
      MONTH
    
      (
    
      GETDATE
    
      ()),
    
      2
    
      ) 
    
      +
    
       "
    
      /
    
      " 
    
      +
    
       
    
      RIGHT
    
      ("
    
      00
    
      "
    
      +
    
      (DT_WSTR,
    
      2
    
      )
    
      DAY
    
      (
    
      GETDATE
    
      ()),
    
      2
    
      ) 
    
      +
    
       "
    
      /
    
      " 
    
      +
    
       (DT_WSTR,
    
      4
    
      )
    
      YEAR
    
      (
    
      GETDATE
    
      ())
   
     

4.SSIS表达式中.(DT_WSTR,<length>)和(DT_STR, <length>, <code_page>) 中最多返回4000个字符.
REPLICATE("x",4000) 成功
REPLICATE("x",4001) 失败

5.其实,在SSIS表达式上.几乎跟SQL SERVER上的使用相同,所以熟悉SQL SERVER的话,将会很容易使用SSIS的表达式.