在Oralce的某一個(gè)表中，一個(gè)地址字段包含了全角的字符，需要轉(zhuǎn)換為半角字符，以便進(jìn)一步處理。

表名：a

包含全角字符的字段：address

編輯表結(jié)構(gòu)，添加一列：address2

在PLSQL中，新建SQL窗口，輸入：update a set a.address2 =(to_single_byte(a.address))

執(zhí)行，提交，即可。

函數(shù)解釋：

轉(zhuǎn)換成半角函數(shù)：

to_single_byte(s)

轉(zhuǎn)換成

全角

函數(shù):

to_multi_byte(s)

以上這個(gè)to_single_byte(s)和to_multi_byte(s)函數(shù)發(fā)揮作用的前提是數(shù)據(jù)庫字符集包括單字節(jié)字符和多字節(jié)字符。

我的另外一臺(tái)數(shù)據(jù)庫安裝的是GBK字符集，但是查看表的內(nèi)碼，發(fā)現(xiàn)表的數(shù)據(jù)是用unicode字符集存儲(chǔ)的，暫時(shí)還未搞明白是怎么回事。。。。。

如果數(shù)據(jù)庫不包含這些字符，需要用repalce()函數(shù)，分別手工去替換：

update a t set t.address = replace(t.address,'Ａ','A')

update a t set t.address = replace(t.address,'Ｂ','B')

update a t set t.address = replace(t.address,'Ｃ','C')

update a t set t.address = replace(t.address,'Ｄ','D')

update a t set t.address = replace(t.address,'Ｅ','E')

update a t set t.address = replace(t.address,'Ｆ','F')

update a t set t.address = replace(t.address,'Ｇ','G')

update a t set t.address = replace(t.address,'Ｈ','H')

update a t set t.address = replace(t.address,'Ｉ','I')

update a t set t.address = replace(t.address,'Ｊ','J')

update a t set t.address = replace(t.address,'Ｋ','K')

update a t set t.address = replace(t.address,'Ｌ','L')

update a t set t.address = replace(t.address,'Ｍ','M')

update a t set t.address = replace(t.address,'Ｎ','N')

update a t set t.address = replace(t.address,'Ｏ','O')

update a t set t.address = replace(t.address,'Ｐ','P')

update a t set t.address = replace(t.address,'Ｑ','Q')

update a t set t.address = replace(t.address,'Ｒ','R')

update a t set t.address = replace(t.address,'Ｓ','S')

update a t set t.address = replace(t.address,'Ｔ','T')

update a t set t.address = replace(t.address,'Ｕ','U')

update a t set t.address = replace(t.address,'Ｖ','V')

update a t set t.address = replace(t.address,'Ｗ','W')

update a t set t.address = replace(t.address,'Ｘ','X')

update a t set t.address = replace(t.address,'Ｙ','Y')

update a t set t.address = replace(t.address,'Ｚ','Z')

update a t set t.address = replace(t.address,'－','-')

update a t set t.address = replace(t.address,'０','0')

update a t set t.address = replace(t.address,'１','1')

update a t set t.address = replace(t.address,'２','2')

update a t set t.address = replace(t.address,'３','3')

update a t set t.address = replace(t.address,'４','4')

update a t set t.address = replace(t.address,'５','5')

update a t set t.address = replace(t.address,'６','6')

update a t set t.address = replace(t.address,'７','7')

update a t set t.address = replace(t.address,'８','8')

update a t set t.address = replace(t.address,'９','9')

手工寫入這些好麻煩，有沒有自動(dòng)化的一點(diǎn)的辦法？

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