Appending data with different type
In follow up to an earlier post, regarding appending data from one table to anlther, please could I have some advice on the appropriatness of using certain data types to accommodate data from a non-SQL data type?
The following is displayed as
non-SQL data type > SQL data type
i) Real > FLOAT
ii) Integer > NUMBER
iii) Boolean > VarChar2
iv) Character > CLOB
v) Integer > FLOAT
vi) Date > VarChar2
My feeling is that i), ii), v) are acceptable, and the rest not acceptable. Please let me know if you disagree.
From an earlier post, I gather that "to_char" is better than "VarChar2" when holding numerical data.
Many thanks
803242 wrote:
In follow up to an earlier post, regarding appending data from one table to anlther, please could I have some advice on the appropriatness of using certain data types to accommodate data from a non-SQL data type?If you are copying data from one table to another, only SQL types are relevant because you cannot create tables with columns using non-SQL types.
The following is displayed as
non-SQL data type > SQL data type
i) Real > FLOAT
ii) Integer > NUMBER
iii) Boolean > VarChar2
iv) Character > CLOB
v) Integer > FLOAT
vi) Date > VarChar2
Only boolean that you have listed as non-SQL types, is actually a non-SQL type.
From an earlier post, I gather that "to_char" is better than "VarChar2" when holding numerical data.For holding numerical data you would use number or a variation such as integer or real, you would definitely not use varchar2. to_char is a data type conversion function, not a data type so is irrelevant.
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