Question

我有这个

set serveroutput on size 30000

MERGE INTO ADV_TEST_INSTITUTION to_t
  USING INSTITUTION from_t
  ON (to_t.CALLISTA_INSTITUTION_CD = from_t.INSTITUTION_CD)

  WHEN NOT MATCHED THEN
    DBMS_OUTPUT.PUT_LINE('not match: ' || from_t.name)
  WHEN MATCHED THEN
    DBMS_OUTPUT.PUT_LINE('match: ' || from_t.name);

错误：

错误报告 - SQL错误：ORA-00905：缺少关键字 00905. 00000 - ＆＃34;缺少关键字＆＃34;

是否可以打印列的值？

Answer 1

MERGE INTO是一个SQL语句，DBMS_OUTPUT.PUT_LINE是一个PL / SQL过程。您试图将这两者合并为一个语句，这是不可能的。

仅当您要执行INSERT或UPDATE时才有效。

MERGE INTO ADV_TEST_INSTITUTION to_t
  USING INSTITUTION from_t
  ON (to_t.CALLISTA_INSTITUTION_CD = from_t.INSTITUTION_CD)

  WHEN NOT MATCHED THEN
    INSERT ( col1,col2,col3) VALUES ( fromt.col1,from_t.col2,from_t.col3) 
  WHEN MATCHED THEN
    UPDATE SET to_t.col1 = from_t.col1 , to_t.col12 = from_t.col2;

如果你的目的只是比较两个表中的记录，而不是执行任何DML，

您可以像这样使用LEFT join和CASE。

SELECT CASE
          WHEN to_t.CALLISTA_INSTITUTION_CD IS NULL
          THEN
             'not match: ' || from_t.name
          ELSE
             'match: ' || from_t.name
       END
          AS match_nomatch
  FROM INSTITUTION from_t
       LEFT JOIN ADV_TEST_INSTITUTION to_t
          ON to_t.CALLISTA_INSTITUTION_CD = from_t.INSTITUTION_CD;

如何在oracle中将DBMS_OUTPUT打印合并到？

1 个答案: