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1、SQL函數(shù)參考手冊O(shè)racle、SQLServer、MySQL南無阿彌陀佛數(shù)據(jù)庫系統(tǒng)自帶函數(shù)..........................................................................................................................................................7字符函數(shù).....................................................
2、.................................................................................................................7由字符獲取ASCII碼ASCII...............................................................................................................................7
3、格式化為ASCII字符串信息ASCIISTR(OracleOnly)..................................................................................7由字符獲取UNICODE碼................................................................................................................................
4、.8返回字符集CHARSET(MySQLOnly)..............................................................................................................8由ASCII碼獲取字符CHR/CHAR.......................................................................................................
5、...........8由UNICODE碼獲取字符NCHAR...................................................................................................................9字符串連接CONCAT
6、
7、/+.................................................................................................
8、................................9單詞首字母大寫INITCAP(OracleOnly)........................................................................................................10字符替換INSERT(MySQLOnly)........................................................................
9、...........................................10字符串搜索INSTR/CHARINDEX/LOCATE..............................................................................................11獲取字符串左邊開始指定個數(shù)的字符LEFT......................................................................
10、...........................12字符串長度LENGTH/LEN............................................................................................................................13加載文件LOAD_FILE（MySQLOnly）
