Create a duplicate table: CREATE TABLE FUND_ACCOUNT2 AS SELECT * FROM FUND_ACCOUNT.In Oracle, you can't modify the datatype of a column if the table has data, and it requires a little trickery to convert a ' ' to a 0. Let's say you have a table called FUND_ACCOUNT that has two columns: AID_YEAR char(4)Īnd let's say that you want to modify the OFFICE_ID to be numeric, but that there are existing rows in the table, and even worse, some of those rows have an OFFICE_ID value of ' ' (blank). If you do an insert lect * from.statement, it's easy to get the 'Invalid Number' error as well. Select string_column from TABLE where string_column <= 'b' Select string_column from TABLE where string_column > '1' Select string_column from TABLE where string_column between '2' and 'z'
So the numerical operations/functions can be applied on the Strings, and these queries work: On the other hand, Oracle can treat Strings as numbers. And the explicit delimiting of the string-numbers resolved the problem.
Although not numerical, the invalid number was reported. and voilà: It returns the expected result.Īnd indeed: the col acc_num in my table is defined as String. Select max(acc_num) from ACCOUNTS where acc_num between '1001000' and '1001999' I have just surrounded the "numerical" values, to make them 'Strings', just making them explicitly delimited: That one presented a problem: Error: ORA-01722: invalid number Select max(acc_num) from ACCOUNTS where acc_num between 10010999 It is the floating-point type with the maximum precision of 63 binary digits and then approximately 18 decimal digits.Oracle does automatic String2number conversion, for String column values! However, for the textual comparisons in SQL, the input must be delimited as a String explicitly: The opposite conversion number2String is not performed automatically, not on the SQL-query level. It is an ANSI and also IBM specific integer type with the maximum precision of 38 decimal digits. This data type is also both ANSI and also IBM specific integer type with maximum precision of 38 decimal digits. It is an ANSI specific integer type that has a maximum precision of 38 decimal digits. That can be approximately 38 decimal digits. This is also known to be an ANSI specific floating-point type with maximum precision of 126 binary digits (approximately 38 decimal digits).įLOAT is known as both ANSI and IBM specific floating-point type that is having maximum precision of 126 binary digits. This is the floating type with the maximum precision of 38 decimal digits. This is known to be an IBM specific fixed-point type with the maximum precision of 38 decimal digits. This is ANSI specific fixed-point type with the maximum precision of 38 decimal digits. This number value can also be represented as 0. It is said to be a fixed point or floating-point number which has an absolute value in the range 1E-130 to (but not including) 1.0E126. This is the double precision IEEE 754- format floating-point number. This is the single precision IEEE 754- format floating-point number. This is also signed integer in the range of -2,147,483,648 to 2,147,483,647 that are represented in 32 bits. This is the signed integer in the range of -2,147,483,648 to 2,147,483,647 that are represented in 32 bits. Below are the list of numeric data types and their sub types.
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