本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。 # 保留的關鍵字 **重要** Amazon S3 Select 不再提供給新客戶。Amazon S3 Select 的現有客戶可以繼續照常使用此功能。[進一步了解](https://aws.amazon.com/blogs/storage/how-to-optimize-querying-your-data-in-amazon-s3/) 以下是 Amazon S3 Select 的預留關鍵字清單。這些關鍵字包含執行 SQL 運算式所需的函數名稱、資料類型、運算子等，該運算式會用來查詢物件內容。 ``` absolute action add all allocate alter and any are as asc assertion at authorization avg bag begin between bit bit_length blob bool boolean both by cascade cascaded case cast catalog char char_length character character_length check clob close coalesce collate collation column commit connect connection constraint constraints continue convert corresponding count create cross current current_date current_time current_timestamp current_user cursor date day deallocate dec decimal declare default deferrable deferred delete desc describe descriptor diagnostics disconnect distinct domain double drop else end end-exec escape except exception exec execute exists external extract false fetch first float for foreign found from full get global go goto grant group having hour identity immediate in indicator initially inner input insensitive insert int integer intersect interval into is isolation join key language last leading left level like limit list local lower match max min minute missing module month names national natural nchar next no not null nullif numeric octet_length of on only open option or order outer output overlaps pad partial pivot position precision prepare preserve primary prior privileges procedure public read real references relative restrict revoke right rollback rows schema scroll second section select session session_user set sexp size smallint some space sql sqlcode sqlerror sqlstate string struct substring sum symbol system_user table temporary then time timestamp timezone_hour timezone_minute to trailing transaction translate translation trim true tuple union unique unknown unpivot update upper usage user using value values varchar varying view when whenever where with work write year zone ```