Dogpaddling as hard as I can to keep up with the demand I put on myself (yeah, it never helps when it is actually your fault does it.) But this week I took at look at the change to SUBSTRING in SQL ...
SUBSTRING は、文字列の一部を抽出するための標準SQL関数です。ISO/IEC 9075(通称ISO SQL)で定義されており、多くのデータベース製品でも対応しています。 SUBSTRINGはDBによって挙動が違います。いや少し語弊があるかもしれません。SUBSTRING('abcde' FROM 3 FOR 2)のよう ...
30 Days 30 SQL Functions Day 7: SUBSTRING( ) Summary: The SQL `SUBSTRING()` function extracts a part of a string based on a specified starting position and optional length. It is commonly used to ...