ORA-01722無效的數字 - 表連接

Question

所以我有這個簡單的Oracle查詢返回我預期的記錄：

SELECT to_number(substr(nr_key,5,4)) as numero 
FROM fattura_pa 
LEFT JOIN fattura_pa_status on status_id = id 
WHERE ute = 'BX' and length(nr_key) < 21 
and to_number(substr(nr_key,5,4)) = 88 

如果我將它轉換成：

SELECT * FROM ( 
    SELECT to_number(substr(nr_key,5,4)) as numero 
    FROM fattura_pa 
    LEFT JOIN fattura_pa_status on status_id = id 
    WHERE ute = 'BX' and length(nr_key) < 21 
) 
where numero = 88 

它給我的「ORA-01722無效號碼」 錯誤

我不能undrestand爲什麼，因爲我的 「NUMERO = 88」，實際上是一個數字...

最奇怪的是，如果我評論的加入，查詢再次運行：

SELECT * FROM ( 
    SELECT to_number(substr(nr_key,5,4)) as numero 
    FROM fattura_pa 
    --LEFT JOIN fattura_pa_status on status_id = id 
    WHERE ute = 'BX' and length(nr_key) < 21 
) 
where numero = 88 

和連接無關用TE「NUMERO」場...

至於問，我在這裏發佈表格：

CREATE TABLE "FE_ENGINE"."FATTURA_PA" 
    ( "UTE" VARCHAR2(2 BYTE) NOT NULL ENABLE, 
    "NR_KEY" VARCHAR2(21 BYTE) NOT NULL ENABLE, 
    "PROGRESSIVO_INVIO" VARCHAR2(20 BYTE) NOT NULL ENABLE, 
    "XML_CREATO" NUMBER(1,0) DEFAULT 0 NOT NULL ENABLE, 
    "XML_FILE_NAME" VARCHAR2(40 BYTE) NOT NULL ENABLE, 
    "POSIZIONE" NUMBER(4,0) DEFAULT 1 NOT NULL ENABLE, 
    "D3_FILE_NAME" VARCHAR2(40 BYTE) NOT NULL ENABLE, 
    "SPEDITA_IL" DATE, 
    "ACCETTATA_IL" DATE, 
    "ARCHIVIATA_IL" DATE, 
    "STATUS_ID" NUMBER(4,0) NOT NULL ENABLE, 
    "RIELABORARE" NUMBER(1,0) DEFAULT 0 NOT NULL ENABLE, 
    "ROW_INSTIME" DATE DEFAULT SYSDATE NOT NULL ENABLE, 
    "ROW_UPTIME" DATE, 
    "NR_KEY_OLD" VARCHAR2(20 BYTE), 
    CONSTRAINT "UQ_FATTURA_PA_FILE_NAME_POSIT" UNIQUE ("XML_FILE_NAME", "POSIZIONE") 
    USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 
    STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 
    PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) 
    TABLESPACE "D3_USR" ENABLE, 
    CONSTRAINT "FATTURA_PA_PK" PRIMARY KEY ("UTE", "NR_KEY", "PROGRESSIVO_INVIO") 
    USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 
    STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 
    PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) 
    TABLESPACE "D3_USR" ENABLE, 
    CONSTRAINT "FK_FATTURA_PA_FATTURA_PA_STATU" FOREIGN KEY ("STATUS_ID") 
     REFERENCES "FE_ENGINE"."FATTURA_PA_STATUS" ("ID") ENABLE 
    ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING 
    STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 
    PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) 
    TABLESPACE "D3_USR" ; 

CREATE TABLE "FE_ENGINE"."FATTURA_PA_STATUS" 
    ( "ID" NUMBER(4,0) NOT NULL ENABLE, 
    "COD_STATUS" VARCHAR2(16 BYTE) NOT NULL ENABLE, 
    "DESC_STATUS" VARCHAR2(100 BYTE) NOT NULL ENABLE, 
    CONSTRAINT "PK_FATTURA_PA_STATUS" PRIMARY KEY ("ID") 
    USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 
    STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 
    PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) 
    TABLESPACE "D3_USR" ENABLE 
    ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING 
    STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 
    PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) 
    TABLESPACE "D3_USR" ; 

有什麼想法嗎？

Answer 1

感謝我得到的建議，一些測試後，只有這樣我能得到它的工作是這樣的：

SELECT to_number(numero) FROM ( 
SELECT substr(nr_key,5,4) as numero 
FROM fattura_pa 
LEFT JOIN fattura_pa_status on status_id = id 
WHERE ute = 'BX' and length(nr_key) < 21 
) 
where numero = lpad('88',4,'0')