oracle 字符串转成行

2021-01-23 18:46:4711

SELECT SUBSTR (T.RPT_ID,

INSTR (T.RPT_ID,',',1,C.LV)+ 1,

INSTR (T.RPT_ID,',',1,C.LV + 1)- (INSTR (T.RPT_ID,',',1,C.LV)+ 1))

AS RPT_ID

FROM (SELECT ',' || '85,86,87' || ',' RPT_ID,

LENGTH ('85,86,87' || ',') - NVL (LENGTH (REPLACE ('85,86', ',')), 0) CNT

FROM DUAL) t,

(SELECT LEVEL lv

FROM DUAL

CONNECT BY LEVEL <= LENGTH('85,86,87' || ',') - NVL(LENGTH(REPLACE('85,86,87', ',')), 0)) c

WHERE T.cnt >= c.lv

说明：CNT表示串里面有多少字符。

当是字符串是表中的字段时，取level<=最大个数

如：

１).取最大个数

SELECT MAX(LENGTH(RPT_ID || ',') -

NVL(LENGTH(REPLACE(RPT_ID, ',')), 0)) INTO v_c

FROM DIM_AUDIT_TABLE@sjmh_inter;

２).l转成行

SELECT T.T_NAME,

T.T_NAME_COMM,

T.T_COLUMN,

T.T_COLUMN_COMM,

t.COMMENT_NL,

t.COMMENT_NL_TIME,

t.SEQ_USER_ID,

SUBSTR(T.RPT_ID,

INSTR(T.RPT_ID, '','', 1, C.LV) + 1,

INSTR(T.RPT_ID, '','', 1, C.LV + 1) -

(INSTR(T.RPT_ID, '','', 1, C.LV) + 1)) AS RPT_ID

FROM (SELECT A.T_NAME,

A.T_NAME_COMM,

A.T_COLUMN,

A.T_COLUMN_COMM,

a.COMMENT_NL,

a.COMMENT_NL_TIME,

a.SEQ_USER_ID,

'','' || A.RPT_ID || '','' RPT_ID,

LENGTH(A.RPT_ID || '','') -

NVL(LENGTH(REPLACE(A.RPT_ID, '','')), 0) CNT

FROM DIM_AUDIT_TABLE@sjmh_inter A

WHERE a.COMMENT_NL is not null) T,

(SELECT LEVEL LV FROM DUAL CONNECT BY LEVEL <= '||v_c||') C

WHERE C.LV <= T.CNT;

注:如果是上面代码是远程的代码,(SELECT LEVEL LV FROM DUAL CONNECT BY LEVEL <= '||v_c||') C,不要用dual表,可以改用all_objects或user_objects, 要不然能查询,但是把查询出来的SQL插入到某个表时,只能插入一行

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