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index and delete

canadiantire(八卦轮胎)

INDEX ON eExpression TO IDXFileName | TAG TagName
[ COLLATE cCollateSequence ] [OF CDXFileName] [FOR lExpression]
[COMPACT] [ASCENDING | DESCENDING] [UNIQUE | CANDIDATE] [ADDITIVE]

examples:

* Example 1
CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')
USE Customer && Open customer table
INDEX ON company TO complist
CLEAR
DISPLAY STATUS

* Example 2
CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')
USE Customer && Open customer table
INDEX ON SUBSTR(city,1,5) + SUBSTR(company,1,6) TO citycomp
CLEAR
DISPLAY STATUS

* Example 3
CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')
USE Customer && Open customer table
INDEX ON address TAG address
INDEX ON company TAG company OF custcdx
CLEAR
DISPLAY STATUS

Delete Record:

DELETE FROM [DatabaseName!]TableName
[WHERE FilterCondition1 [AND | OR FilterCondition2 ...]] --- Standard SQL statement

(#1867911@0)
Last Updated: 2004-9-1
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工作学习 / IT技术讨论 / 紧急求救！运行Foxpro时死机了，重新运行时有些数据库打不开了，怎么办？ -anyi(老山东); 2004-8-24 (#1855657@0)

第一是把文件都备份. 第二步,可以用其它软件打开数据库文件试一下.我没有用过FOXPRO,如果是旧的FOXPRO文件,其实就是一个简单文件而已,很多软件都可以读它,例如ACCESS,甚至有C的库可以读. -pleased(please); 2004-8-24 (#1855739@0)
rebuild index -647i(aaaa); 2004-8-25 (#1855872@0)

您讲到点子上了,但是我不知道如何重新建立索引.能不能详细一点? -anyi(老山东); 2004-8-25 (#1857034@0)

虽然没有用过FOXPRO,还是记得索引文件是可以根据数据文件建立的.就是一条命令,新的FOXPRO应该是菜单上就有吧. -pleased(please); 2004-8-26 (#1857210@0)
Sorry, I only know the index will be corrupt when the db is un-normal shutdown. I don't the syntax. Do u have online help with the software? -647i(aaaa); 2004-8-31 (#1867518@0)

高手们,我更正点错误：原来是Foxpro，后来再VFP下重新编译运行了。这样的情况如何重建索引？另外，能不能将数据库置零，这样重新输入数据？希望哪位高手留下电话，详细求教。谢谢！ -anyi(老山东); 2004-8-31 (#1867205@0)

不好意思。 -henhen(亨亨 ^_*); 2004-8-31 {139} (#1867216@0)
VFP跟foxpro的索引很不同，多年不用，不太记得了，你找些资料看看吧，数据库置0是什么意思？当然可以把那些table的记录清掉，记得foxpro有个命令的。
index and delete -canadiantire(八卦轮胎); 2004-9-1 {945} (#1867911@0)
INDEX ON eExpression TO IDXFileName | TAG TagName
[ COLLATE cCollateSequence ] [OF CDXFileName] [FOR lExpression]
[COMPACT] [ASCENDING | DESCENDING] [UNIQUE | CANDIDATE] [ADDITIVE]

examples:

* Example 1
CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')
USE Customer && Open customer table
INDEX ON company TO complist
CLEAR
DISPLAY STATUS

* Example 2
CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')
USE Customer && Open customer table
INDEX ON SUBSTR(city,1,5) + SUBSTR(company,1,6) TO citycomp
CLEAR
DISPLAY STATUS

* Example 3
CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')
USE Customer && Open customer table
INDEX ON address TAG address
INDEX ON company TAG company OF custcdx
CLEAR
DISPLAY STATUS

Delete Record:

DELETE FROM [DatabaseName!]TableName
[WHERE FilterCondition1 [AND | OR FilterCondition2 ...]] --- Standard SQL statement

@Florida

index and delete

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