Oracle - ORA-00932: inconsistent datatypes: expected NUMBER got CHAR

Hello all

I have an error in the query bellow saying:
ORA-00932: inconsistent datatypes: expected NUMBER got CHAR

How can i fix this?

The value i have in that column is a rate. I want to have the format 0.00

Thanks again for your help

SELECT 
    'H',
    'M',
    ROW_NUMBER() OVER (ORDER BY TLR.CARRIER_ID) as ROW_NUM,
    TLR.CARRIER_ID,
    LRN.FROM_KEY_NUM,
    LRN.FROM_LOW_KEY_VALUE,
    CASE LRN.FROM_HIGH_KEY_VALUE
        WHEN '0' THEN ''
        ELSE LRN.FROM_HIGH_KEY_VALUE
      END,    
    LRN.FROM_COUNTRY,
    LRN.TO_KEY_NUM,
    LRN.TO_LOW_KEY_VALUE,
     CASE LRN.TO_HIGH_KEY_VALUE
        WHEN '0' THEN ''
        ELSE LRN.TO_HIGH_KEY_VALUE
      END,
    LRN.TO_COUNTRY,
       CASE TRD.UNLOAD_MILE_RATE
        WHEN '0' THEN ''
        ELSE TO_CHAR(TRD.UNLOAD_MILE_RATE,'fm99999.00')
      END,
    TRD.MAX_STOPS
FROM 
    TL_RATE TLR, TL_RATE_DETAIL TRD, LANE_RATE_NETWORK LRN

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LVL 11

Wilder1626Asked: 2013-01-06

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Solutions

LVL 23

Steve WalesConnect With a Mentor Senior Database AdministratorCommented: 2013-01-06

If TRD.UNLOAD_MILE_RATE is a number I think the WHEN is what's causing the problem

You're comparing UNLOAD_MILE_RATE (a number) to '0' (a character).

Try this ?

    CASE TRD.UNLOAD_MILE_RATE
        WHEN 0 THEN NULL
        ELSE TO_CHAR(TRD.UNLOAD_MILE_RATE,'fm99999.00')
      END,

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LVL 14

ajexpertConnect With a Mentor Commented: 2013-01-06

Could you please let us know datatype of UNLOAD_MILE_RATE in TL_RATE_DETAIL table? I suspect it is already VARCHAR2

LVL 23

DavidSenior Oracle Database AdministratorCommented: 2013-01-06

Try instead, ELSE TO_NUMBER(TRD.UNLOAD_MILE_RATE,'fm99999.00')...

FYI, if you use SQL*Plus to test the statement, the parser will indicate where the error was found -- a faster way to debug the code.

LVL 11

Wilder1626Author Commented: 2013-01-06

Hi ajexpert

The UNLOAD_MILE_RATE in TL_RATE_DETAIL is NUMBER(10,2) data type.

Hi dvz,

is SQL*PLUS a module i would have to instal?

I'm pretty new in Oracle sql.

also, i still have:
ORA-00932: inconsistent datatypes: expected NUMBER got CHAR

with:

 CASE TRD.UNLOAD_MILE_RATE
        WHEN '0' THEN ''
        ELSE TO_NUMBER(TRD.UNLOAD_MILE_RATE,'fm99999.00')
      END,

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LVL 23

DavidSenior Oracle Database AdministratorCommented: 2013-01-06

Ok, I was wrong about changing the function, go back to TO_CHAR. Change the THEN '' to THEN NULL, and try again.

SQL*Plus is a client-side terminal session. With the target username, password, target database (SID), and TCP/IP port, one can get into command line mode without any GUI interference. It's a separate discussion, plenty of how-to in the knowledge base and on Oracle.

LVL 11

Wilder1626Author Commented: 2013-01-06

I will look at this SQL*Plus.

Now with the update query to:

    CASE TRD.UNLOAD_MILE_RATE
        WHEN '0' THEN NULL
        ELSE TO_CHAR(TRD.UNLOAD_MILE_RATE,'fm99999.00')
      END,

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I still have:
ORA-00932: inconsistent datatypes: expected NUMBER got CHAR

LVL 23

DavidConnect With a Mentor Senior Oracle Database AdministratorCommented: 2013-01-06

Good catch; '0' should be 0. However, it raises the question that inbound NULL values should be trapped as well. Something like, when a rate is > 0, then to_char... else NULL.