我有一张看起来像这样的表：
__________________________________________________________________________________
|id |code |code_status |code_due_date|code2 |code_status2 |code_due_date2|...|
|1 |ABCD |A |MMDDYYYY |Null |Null |Null |...|
|2 |Null |Null |Null |Null |Null |Null |...|
|3 |EFGH |A |MMDDYYYY |ABCD |B |MMDDYYYY |...|
|... |... |... |... |... |... |... |...|
----------------------------------------------------------------------------------
实际表格结构是：
CREATE TABLE MY_DATA (
PRSN_UNIV_ID VARCHAR2(11),
CHKL_ITM_CD_1 VARCHAR2(6),
CHKL_ITM_CD_2 VARCHAR2(6),
CHKL_ITM_CD_3 VARCHAR2(6),
CHKL_ITM_CD_4 VARCHAR2(6),
CHKL_ITM_CD_5 VARCHAR2(6),
CHKL_ITM_CD_6 VARCHAR2(6),
CHKL_ITM_CD_7 VARCHAR2(6),
CHKL_ITM_CD_8 VARCHAR2(6),
CHKL_ITM_CD_9 VARCHAR2(6),
CHKL_ITM_CD_10 VARCHAR2(6),
CHKL_ITM_CD_11 VARCHAR2(6),
CHKL_ITM_CD_12 VARCHAR2(6),
CHKL_ITM_CD_13 VARCHAR2(6),
CHKL_ITM_CD_14 VARCHAR2(6),
CHKL_ITM_CD_15 VARCHAR2(6),
CHKL_ITM_CD_16 VARCHAR2(6),
CHKL_ITM_CD_17 VARCHAR2(6),
CHKL_ITM_CD_18 VARCHAR2(6),
CHKL_ITM_CD_19 VARCHAR2(6),
CHKL_ITM_CD_20 VARCHAR2(6),
CHKL_ITM_CD_21 VARCHAR2(6),
CHKL_ITM_CD_22 VARCHAR2(6),
CHKL_ITM_CD_23 VARCHAR2(6),
CHKL_ITM_CD_24 VARCHAR2(6),
CHKL_ITM_CD_25 VARCHAR2(6),
CHKL_ITM_CD_26 VARCHAR2(6),
CHKL_ITM_CD_27 VARCHAR2(6),
CHKL_ITM_CD_28 VARCHAR2(6),
CHKL_ITM_CD_29 VARCHAR2(6),
CHKL_ITM_CD_30 VARCHAR2(6),
CHKL_ITM_STAT_CD_1 VARCHAR2(1),
CHKL_ITM_STAT_CD_2 VARCHAR2(1),
CHKL_ITM_STAT_CD_3 VARCHAR2(1),
CHKL_ITM_STAT_CD_4 VARCHAR2(1),
CHKL_ITM_STAT_CD_5 VARCHAR2(1),
CHKL_ITM_STAT_CD_6 VARCHAR2(1),
CHKL_ITM_STAT_CD_7 VARCHAR2(1),
CHKL_ITM_STAT_CD_8 VARCHAR2(1),
CHKL_ITM_STAT_CD_9 VARCHAR2(1),
CHKL_ITM_STAT_CD_10 VARCHAR2(1),
CHKL_ITM_STAT_CD_11 VARCHAR2(1),
CHKL_ITM_STAT_CD_12 VARCHAR2(1),
CHKL_ITM_STAT_CD_13 VARCHAR2(1),
CHKL_ITM_STAT_CD_14 VARCHAR2(1),
CHKL_ITM_STAT_CD_15 VARCHAR2(1),
CHKL_ITM_STAT_CD_16 VARCHAR2(1),
CHKL_ITM_STAT_CD_17 VARCHAR2(1),
CHKL_ITM_STAT_CD_18 VARCHAR2(1),
CHKL_ITM_STAT_CD_19 VARCHAR2(1),
CHKL_ITM_STAT_CD_20 VARCHAR2(1),
CHKL_ITM_STAT_CD_21 VARCHAR2(1),
CHKL_ITM_STAT_CD_22 VARCHAR2(1),
CHKL_ITM_STAT_CD_23 VARCHAR2(1),
CHKL_ITM_STAT_CD_24 VARCHAR2(1),
CHKL_ITM_STAT_CD_25 VARCHAR2(1),
CHKL_ITM_STAT_CD_26 VARCHAR2(1),
CHKL_ITM_STAT_CD_27 VARCHAR2(1),
CHKL_ITM_STAT_CD_28 VARCHAR2(1),
CHKL_ITM_STAT_CD_29 VARCHAR2(1),
CHKL_ITM_STAT_CD_30 VARCHAR2(1),
CHKL_ITM_DUE_DT_1 DATE,
CHKL_ITM_DUE_DT_2 DATE,
CHKL_ITM_DUE_DT_3 DATE,
CHKL_ITM_DUE_DT_4 DATE,
CHKL_ITM_DUE_DT_5 DATE,
CHKL_ITM_DUE_DT_6 DATE,
CHKL_ITM_DUE_DT_7 DATE,
CHKL_ITM_DUE_DT_8 DATE,
CHKL_ITM_DUE_DT_9 DATE,
CHKL_ITM_DUE_DT_10 DATE,
CHKL_ITM_DUE_DT_11 DATE,
CHKL_ITM_DUE_DT_12 DATE,
CHKL_ITM_DUE_DT_13 DATE,
CHKL_ITM_DUE_DT_14 DATE,
CHKL_ITM_DUE_DT_15 DATE,
CHKL_ITM_DUE_DT_16 DATE,
CHKL_ITM_DUE_DT_17 DATE,
CHKL_ITM_DUE_DT_18 DATE,
CHKL_ITM_DUE_DT_19 DATE,
CHKL_ITM_DUE_DT_20 DATE,
CHKL_ITM_DUE_DT_21 DATE,
CHKL_ITM_DUE_DT_22 DATE,
CHKL_ITM_DUE_DT_23 DATE,
CHKL_ITM_DUE_DT_24 DATE,
CHKL_ITM_DUE_DT_25 DATE,
CHKL_ITM_DUE_DT_26 DATE,
CHKL_ITM_DUE_DT_27 DATE,
CHKL_ITM_DUE_DT_28 DATE,
CHKL_ITM_DUE_DT_29 DATE,
CHKL_ITM_DUE_DT_30 DATE
)
我需要做类似下面的伪代码，但我不知道如何写它或者甚至可能。我需要首先遍历每一行并测试该行中的列是否等于代码。如果是，我想取相同数字的状态和截止日期，并将其放入正确的变量中。我需要循环测试大约30种不同的代码。
Declare variables
variable_code_status
variable_code_due_date
variable_code_status2
variable_code_due_date2
variable_code_status3
variable_code_due_date3
...
for each row
for each column
if column = code
set variable_code_status = code_status
set variable_code_due_date = code_due_date
end if
if column = code2
set variable_code_status = code_status2
set variable_code_due_date = code_due_date2
end if
if column - code3
set variable_code_status = code_status3
set variable_code_due_date = code_due_date3
end if
...
end for
end for
insert into table(
variable_code_status
variable_code_due_date
variable_code_status2
variable_code_due_date2
variable_code_status3
variable_code_due_date3
...);
我不确定这对任何人是否有意义。
答案 0 :(得分：1)
你可以这样做：
declare
id MY_DATA.PRSN_UNIV_ID%type;
cd varchar2(6);
stat varchar2(1);
due date;
cur sys_refcursor;
begin
for i in 1..30 loop
open cur for
'select PRSN_UNIV_ID, CHKL_ITM_CD_'||i||', CHKL_ITM_STAT_CD_'||i||', CHKL_ITM_DUE_DT_'||i||' from MY_DATA';
loop
fetch cur into id, cd, stat, due;
exit when cur%notfound;
if .... then --> put here all your conditions
insert into ....
end if;
end loop;
end loop;
end;
答案 1 :(得分：1)
我不确定我是否完全遵循了您之后所做的事情，但似乎您可能最好不要使用UNPIVOT和{{JOIN。 1}}到你的代码表：
WITH cte AS (
SELECT *
FROM Table1
UNPIVOT (value FOR field IN ("code", "code_status", "code_due_date", "code2", "code_status2","code_due_date2"))
)
SELECT a.*
FROM cte a
INNER JOIN codes b
ON a.value = b."code_value"
演示：SQL Fiddle
这可以获取符合条件的ID，字段和值。如果您需要基表中的其他信息，可以使用这些结果加入。
答案 2 :(得分：1)
您可以使用SYS_REFCURSOR和DBMS_SQL包动态地满足此要求。以下过程是如何与查询动态交互的一般示例，在这种情况下，它只是将结果打印到控制台。您可以修改它以在每次迭代时测试列描述并执行一些不同的操作。 （这适用于11.2.0.3.0）
PROCEDURE Output_Any_Query (
pcRefCursor IN OUT SYS_REFCURSOR
) IS
vnCursorNum NUMBER;
vnColCount NUMBER;
vtabDescriptions DBMS_SQL.DESC_TAB;
vsColumnValue VARCHAR2(4000);
BEGIN
vnCursorNum := DBMS_SQL.to_cursor_number(pcRefCursor);
DBMS_SQL.DESCRIBE_COLUMNS(vnCursorNum, vnColCount, vtabDescriptions);
--Print the column headers
FOR i IN 1..vnColCount LOOP
dbms_sql.define_column(vnCursorNum, i, vsColumnValue, 4000);
dbms_output.put(RPAD(LPAD(vtabDescriptions(i).col_name,15),20)||'|');
END LOOP;
--End of line
dbms_output.put_line('');
--loop through the rows
WHILE ( dbms_sql.fetch_rows(vnCursorNum) > 0 ) LOOP
--loop across the columns
FOR i IN 1 .. vnColCount LOOP
dbms_sql.column_value(vnCursorNum, i, vsColumnValue);
dbms_output.put(RPAD(NVL(vsColumnValue,' '),20)||'|');
END LOOP;
--End of line
dbms_output.put_line('');
END LOOP;
END;