循环字符串时如何插入临时表 - Oracle - PL/SQL

Question

CREATE GLOBAL TEMPORARY TABLE tt_temptable(
    RowNums   NUMBER(3,0),
    procNums  NUMBER(18,0)
) ON COMMIT PRESERVE ROWS;

  inputString  VARCHAR2 ;

  inputString := '12,13,14,15'


SELECT   REGEXP_SUBSTR (inputString,'[^,]+',1,LEVEL) ProcNums
FROM dual CONNECT BY  REGEXP_SUBSTR (inputString,'[^,]+',1,LEVEL) IS NOT NULL;

  INSERT INTO tt_temptable( 
    SELECT identity(3) RowNums,procNums
      FROM 

);

想在 temptable 中插入 12 , 13, 14 , 15 和 3 长度的标识，所以 temptable 中总共有 4 行

Answer 1

如果您使用Oracle 12c，那么您可以在表定义中通过GENERATED ALWAYS AS IDENTITY 定义一个IDENTITY 列，并按照以下方式操作：

SQL> CREATE GLOBAL TEMPORARY TABLE tt_temptable(
  2        RowNums NUMBER(3,0) GENERATED ALWAYS AS IDENTITY,
  3        procNums  NUMBER(18,0)
  4    ) ON COMMIT PRESERVE ROWS;

Table created

SQL> 
SQL> DECLARE
  2    inputString  VARCHAR2(50) := '12,13,14,15';
  3  BEGIN
  4      INSERT INTO tt_temptable(procNums)
  5         SELECT REGEXP_SUBSTR (inputString,'[^,]+',1,LEVEL) ProcNums
  6           FROM dual
  7        CONNECT BY  REGEXP_SUBSTR (inputString,'[^,]+',1,LEVEL) IS NOT NULL;
  8  END;
  9  /

PL/SQL procedure successfully completed

SQL> SELECT * FROM tt_temptable;

ROWNUMS            PROCNUMS
------- -------------------
      1                  12
      2                  13
      3                  14
      4                  15

要重置 IDENTITY 列 (RowNums)，请使用：

SQL> ALTER TABLE tt_temptable MODIFY( RowNums Generated as Identity (START WITH 1));

每当表上的共享锁被释放时。

Answer 2

insert 
  into tt_temptable 
select NVL((select max(a.rownums) 
                from tt_temptable a
              ),100)+rownum
         ,procNums 
  from (SELECT REGEXP_SUBSTR ('10,20,30','[^,]+',1,LEVEL) ProcNums,level as lvl
          FROM dual 
       CONNECT BY  REGEXP_SUBSTR ('10,20,30','[^,]+',1,LEVEL) IS NOT NULL
       )x