154.CONCAT()
返回兩個(gè)字符串的連接.
SELECTCONCAT(EMP_NO,EMP_NAM)FROMBSEMPMS;
155.YEAR()
返回?cái)?shù)值的年部分.
SELECTYEAR('2003/01/02')FROMBSEMPMS;
156.VARCHAR()
返回字符串,日期型,圖形串的可變長(zhǎng)度的字符串表示.
SELECTVARCHAR(EMP_NAM,50)FROMBSEMPMS;
157.UCASE()ORUPPER()
返回字符串的大寫.
SELECTUCASE(EMP_NAM)FROMBSEMPMS;
SELECTUPPER(EMP_NO)FROMBSEMPMS;
158.TRUNCATE()ORTRUNC()
從表達(dá)式小數(shù)點(diǎn)右邊的位置開始截?cái)嗖⒎祷卦摂?shù)值.
SELECTTRUNCATE(345.6789,2)FROMBSEMPMS;
159.TIME()
返回一個(gè)數(shù)值中的時(shí)間.
SELECTTIME('2001-03-19.12.30.123456')FROMBSEMPMS;
160.SUBSTR(EXP1,EXP2)
返回EXP1串自EXP2處開始的子串.
SELECTSUBSTR('CDNJFDJFJD',5)FROMBSEMPMS;
SELECTSUBSTR('CDNJFDJFJD',5,2)FROMBSEMPMS;
161.SQRT()
返回該參數(shù)的平方根.
SELECTSQRT(36)FROMBSEMPMS;
162.SPACE()
返回由參數(shù)指定的長(zhǎng)度,包含空格在內(nèi)的字符串.
SELECTSPACE(10)FROMBSEMPMS;
163.SECOND()
返回一個(gè)數(shù)值的秒部分.
SELECTSECOND('18:34:32')FROMBSEMPMS;
164.RTRIM()
刪除字符串尾部的空格.
SELECTRTRIM('COMMENT')FROMBSEMPMS;
165.ROUND(EXP1,EXP2)
返回EXP1小數(shù)點(diǎn)右邊的第EXP2位置處開始的四舍五入值.
SELECTROUND(2345.6789,2)FROMBSEMPMS;
166.REPLACE(EXP1,EXP2,EXP3)
用EXP3替代EXP1中所有的EXP2
SELECTCHAR(REPLACE('ROMANDD','NDD','CCB'),10)FROMBSEMPMS;
