I am trying to create the following table in Oracle.
CREATE TABLE CUSTOMER(CUST_ID INT(10),
CUST_NAME VARCHAR2(50),
CUST_SEX CHAR(2),
CUST_STATE VARCHAR2(50),
CUST_COUNTRY VARCHAR2(50));
I get an error saying that the right parenthesis is missing. In reality, the issue is with the INT data type for the CUST_ID column. Once I remove the precision :(10) from the DDL query, I am able to execute it successfully.
Oracle docs don't specify anything with regarding to whether this data type can be accompanied by a precision parameter or not. However Oracle does mention that INTEGER/INT is per ANSI standards.
https://docs.oracle.com/cd/B19306_01/olap.102/b14346/dml_datatypes002.htm
Certain other non-official references describe INT/INTEGER to be a synonym for NUMBER(38).
Can someone please tell me if precision cannot indeed be specified for INT datatype?
The Oracle docs state that:
SQL statements that create tables and clusters can also use ANSI data types and data types from the IBM products SQL/DS and DB2. Oracle recognizes the ANSI or IBM data type name that differs from the Oracle Database data type name. It converts the data type to the equivalent Oracle data type
As the table below that sentence states, int, integer, and (surprisingly?) smallint are all synonyms for number(38), so you cannot specify a precision for them. For your usecase, if you want an integer number with ten digits, you should use number(10).
Let me try: precision cannot indeed be specified for INT datatype.
How did it sound?
Documentation says:
<snip>
| { NUMERIC | DECIMAL | DEC } [ (precision [, scale ]) ] --> precision + scale
| { INTEGER | INT | SMALLINT } --> no precision for integers
| FLOAT [ (size) ]
<snip>
The INT[EGER] data type (which should be , at least mostly, a 4-byte binary integer), in Oracle, exists, if at all, in PL/SQL stored procedures.
Your best bet is to design a NUMBER(5) for a SMALLINT, a NUMBER(9) for an INTEGER, and a NUMBER(18) for a LARGEINT/BIGINT
If you go:
CREATE TABLE dropme (i INT);
, in Oracle, you get a table with a column i NUMBER (with no length specification, which boils down to a pretty in-efficient NUMBER(38).
The Oracle numeric data types are NUMBER , with an optional overall precision and an optional decimal scale, and FLOAT.
And an Oracle NUMBER, at least as I understood it, is a variable-length construct, with a binary, two-byte, length indicator for the whole thing, followed by a binary decimal notation , in which every following half-byte can hold between 0000 and 1001, binary, or 0 to 9 - except the last one, which contains the sign: positive/negative.
As the documentation says, INTEGER is equivalent to NUMBER(38).
You can just use INTEGER where you want to store integers of any size, or you can use NUMBER(n) if you want to constrain the number of digits in the values to n.
Note: the only reason for specifying the precision in Oracle is for validation and documentation. There is no space advantage in using smaller values of n: the value 123456 occupies the same number of bytes in NUMBER(6) and NUMBER(38) and INTEGER columns - i.e. 4 bytes.
I have column datatype on db2 as
"column name" VARBINARY(2000) defalut Binary(X'20')
I need its equivalent column datatype and default value for oracle
Use RAW or LONG RAW Datatype, However Oracle recommends BLOB and BFILE datatypes for large amounts of binary data.
Check this link for further information
Use Oracle type RAW or LONG RAW , and use the same default value.
Example:
,mycol raw(2000) default to_number(' ')
datatype replacement for VARBINARY is raw in oracle( as per remaining answers).
But the default value for Binary(X'20') is representing a space.
As the hexadecimal value for a space is 20,and for that reason its mentioned as X'20'.
select rawtohex(' ') from dual; which will give you 20.
I have a column in Oracle to store comments of Nvarchar2(2000). When a user tries to enter beyond 2000 characters, I get the following error:
ORA-00910: specified length too long for its datatype.
The NLS_NCHAR_CHARACTERSET parameter is having AL16UTF16 value.
Is there any way to increase the size to accept up to 6000 characters? My column already has lots of contents, so not sure if I will be able to change the datatype from NVarchar(2000) to any other.
Unless you use Oracle 12c, it's not possible to store more than 2000 characters, see the datatypes description here:
http://docs.oracle.com/cd/B28359_01/server.111/b28320/limits001.htm
Instead, you should use the NCLOB datatype.
If you use 12c, check: http://dbasolved.com/2013/06/26/change-varchar2-to-32k-12c-edition/
I am comparing two databases which have similar schema. Both should support unicode characters.
When i describe the same table in both database, db 1 shows all the varchar fields with char, (eg varchar(20 char)) but the db2 shows without char, (varchar(20)
the second schema supports only one byte/char.
When i compare nls_database_parameters and v$nls_parameters in both database its all same.
could some one let me know what may be the change here?
Have you checked NLS_LENGTH_SEMANTICS? You can set the default to BYTE or CHAR for CHAR/VARCHAR2 types.
If these parameters are the same on both datbases then maybe the table was created by explicitly specifying it that way.
I need to cast a varchar to a float. (The varchar is guaranteed to be a number)
I'm trying to create a materialized view on top of a pre-built table. Because of this, all the data types must match exactly...including the precision and size of the data types. The original column (before the NVL was added) was pulling from a FLOAT data type with a precision of 126. When I try casting a varchar to a float of a precision of 126 it doesn't seem to include the 126 data precision.
(I tested the fact that it wasn't including the 126 data size by creating a standard view with the below query that casts to float(126). Through my Toad IDE I could see that the precision of the "ThisorThat" float column was 38).
I have simply updated my materialized view with a NVL statement like so...
Select Cast(NVL(thisFloat, thatFloat) as Float(126)) as ThisorThat
....
From tables;
I get the error "Ora-12060: shape of prebuilt table does not match definition query" because the sizes are different than the original table that I am "pre-building" upon. I need to somehow cast the varchar to a float with an explicit size of 126. Any ideas?
Version: Oracle 10g
Edit:
Here's a link which is basically the same thing I'm encountering.
Use
TO_BINARY_FLOAT(mynumberstring)
or
TO_BINARY_DOUBLE(mynumberstring)
What you're trying to do actually isn't a cast, it's a conversion.