具有日期格式化的Teradata DDL

Question

我想用YYYY-MM格式在teradata中創建表並將默認值設置爲'0001-01'。是否有可能做到這一點？..但是我能夠做到這一點..

創建表格測試（t1日期格式'yyyy-mm'非空）;

Answer 1

日期在內部存儲爲Teradata中的INTEGER值。您必須將DEFAULT指定爲DATE '0001-01-01'並允許FORMAT子句將格式化的數據返回給客戶端。這也意味着您將不得不將數據加載爲有效日期，而不是「yyyy-mm」值。

編輯：

/* Test results in Teradata Studio 14.2 via JDBC connection to Teradata 13.10 */ 

create table MyDB.MyTable 
    (x1 date format 'yyyy-mm' not null default date '0001-01-01'); 

insert into MyDB.MyTable values (date '2013-01-01'); -- Succeeds 
insert into MyDB.MyTable values ('2013-02'); -- Fails 
insert into MyDB.MyTable values (date '2013-02'); -- Fails 

select * from cms_work_comm_prd.t5; -- Returns to Teradata Studio (JDBC): 2013-01-01 

Answer 2

兩者都完美的工作。

請參閱下面的語法。

BTEQ -- Enter your SQL request or BTEQ command: 
ct t1(x1 int,y1 date format 'yyyy-mm' not null default date '0001-01-01'); 

ct t1(x1 int,y1 date format 'yyyy-mm' not null default date '0001-01-01'); 

*** Table has been created. 
*** Total elapsed time was 1 second. 


BTEQ -- Enter your SQL request or BTEQ command: 
ins t1(1,'2011-11'); 

ins t1(1,'2011-11'); 

*** Insert completed. One row added. 
*** Total elapsed time was 1 second. 


BTEQ -- Enter your SQL request or BTEQ command: 
ins t1(2,); 

ins t1(2,); 

*** Insert completed. One row added. 
*** Total elapsed time was 1 second. 


BTEQ -- Enter your SQL request or BTEQ command: 
sel * from t1; 

sel * from t1; 

*** Query completed. 2 rows found. 2 columns returned. 
*** Total elapsed time was 1 second. 

     x1  y1 
----------- ------- 
      1 2011-11 
      2 0001-01