Oracle/PLSQL Built-In Functions

Oracle/PLSQL Built-In Functions

今天發現的一個很不錯的網站，對常見函數有個很好的講解，原本還想本身整理一下，學了這麼長時間都沒有系統的整理過，看了這個確實不錯，值得一看。有很多例子，雖然有些確實很簡單，沒有必要舉例，可是也足以見證筆者的耐心和負責。在此我把這裏粘貼過來，不過都是引用的該網站的連接。

 

Character / String Functions(字符處理函數）
	Ascii	Convert	Lower	Soundex
	AsciiStr	Decompose	Lpad	Substr
	Chr	Dump	Ltrim	Translate
	Compose	Initcap	Replace	Trim
	Concat	Instr	Rpad	Upper
	Concat with ||	Length	Rtrim	VSize

Conversion Functions:(轉換函數）
	Bin_To_Num	NumToDSInterval	To_Date	To_Number
	Cast	NumToYMInterval	To_DSInterval	To_Single_Byte
	CharToRowid	RawToHex	To_Lob	To_Timestamp
	From_Tz	To_Char	To_Multi_Byte	To_Timestamp_Tz
	HexToRaw	To_Clob	To_NClob	To_YMInterval

Advanced Functions:(高級函數)
	BFilename	Group_ID	NULLIF	User
	Cardinality	Lag	NVL	UserEnv
	Case Statement	Lead	NVL2
	Coalesce	LNNVL	Sys_Context
	Decode	NANVL	Uid

Mathematical Functions:(數學相關函數）
	Abs	Covar_pop	Max	Sqrt
	Acos	Covar_samp	Median	StdDev
	Asin	Count	Min	Sum
	Atan	Cume_Dist	Mod	Tan
	Atan2	Dense_Rank	Power	Tanh
	Avg	Exp	Rank	Trunc (numbers)
	Bin_To_Num	Extract	Remainder	Trunc (dates)
	BitAnd	Floor	Round (numbers)	Var_pop
	Ceil	Greatest	Round (dates)	Var_samp
	Corr	Least	Sign	Variance
	Cos	Ln	Sin
	Cosh	Log	Sinh

Date Functions:(日期函數)
	Add_Months	Last_Day	Round	To_Date
	Current_Date	LocalTimestamp	SessionTimeZone	Trunc
	Current_Timestamp	Months_Between	Sysdate	Tz_Offset
	DbTimeZone	New_Time	SysTimestamp
	From_Tz	Next_Day	To_Char

Error Functions:(關於錯誤代碼的函數）
	SQLCODE
	SQLERRM