10 Oracle SQL features you probably didn’t know

I can not guarantee that you never heared of this. But the majority of developers doesn’t know or doesn’t seem to know. And honestly –  most of this information is fairly useless – and mostly harmless.

10. Why we have the CONCAT function

There is a concat function that can be used instead of the concat operator ||.

Nobody uses that! But there is a reason why it exists.

This is from the 8.1.7 Oracle documention

On most platforms, the concatenation operator is two solid vertical bars, as shown in Table 3-3. However, some IBM platforms use broken vertical bars for this operator. When moving SQL script files between systems having different character sets, such as between ASCII and EBCDIC, vertical bars might not be translated into the vertical bar required by the target Oracle environment. Oracle provides the CONCAT character function…