我用這個代碼作爲Excel宏來解析選擇和提取tabl e名稱。
我的分析假設sintax未使用「從A,B,C中選擇」。
只要運行它針對你的SQL查詢,如果你不與結果sadisfied你應該只有幾行代碼從結果遠的你期望的那樣。只是調試,並相應地修改代碼。
子get_tables()
sql_query = Cells(5, 1).Value
tables = ""
'get all tables after from
sql_from = sql_query
While InStr(1, UCase(sql_from), UCase("from")) > 0
i = InStr(1, UCase(sql_from), UCase("from"))
sql_from = Mid(sql_from, i + 5, Len(sql_from) - i - 5)
i = InStr(1, UCase(sql_from), UCase(" "))
While i = 1
sql_from = Mid(sql_from, 2, Len(sql_from) - 1)
i = InStr(1, UCase(sql_from), UCase(" "))
Wend
i = InStr(1, sql_join, Chr(9))
While i = 1
sql_join = Mid(sql_join, 2, Len(sql_join) - 1)
i = InStr(1, sql_join, Chr(9))
Wend
a = InStr(1, UCase(sql_from), UCase(" "))
b = InStr(1, sql_from, Chr(10))
c = InStr(1, sql_from, Chr(13))
d = InStr(1, sql_from, Chr(9))
MinC = a
If MinC > b And b > 0 Then MinC = b
If MinC > c And c > 0 Then MinC = c
If MinC > d And d > 0 Then MinC = d
tables = tables + "[" + Mid(sql_from, 1, MinC - 1) + "]"
Wend
'get all tables after join
sql_join = sql_query
While InStr(1, UCase(sql_join), UCase("join")) > 0
i = InStr(1, UCase(sql_join), UCase("join"))
sql_join = Mid(sql_join, i + 5, Len(sql_join) - i - 5)
i = InStr(1, UCase(sql_join), UCase(" "))
While i = 1
sql_join = Mid(sql_join, 2, Len(sql_join) - 1)
i = InStr(1, UCase(sql_join), UCase(" "))
Wend
i = InStr(1, sql_join, Chr(9))
While i = 1
sql_join = Mid(sql_join, 2, Len(sql_join) - 1)
i = InStr(1, sql_join, Chr(9))
Wend
a = InStr(1, UCase(sql_join), UCase(" "))
b = InStr(1, sql_join, Chr(10))
c = InStr(1, sql_join, Chr(13))
d = InStr(1, sql_join, Chr(9))
MinC = a
If MinC > b And b > 0 Then MinC = b
If MinC > c And c > 0 Then MinC = c
If MinC > d And d > 0 Then MinC = d
tables = tables + "[" + Mid(sql_join, 1, MinC - 1) + "]"
Wend
tables = Replace(tables, ")", "")
tables = Replace(tables, "(", "")
tables = Replace(tables, " ", "")
tables = Replace(tables, Chr(10), "")
tables = Replace(tables, Chr(13), "")
tables = Replace(tables, Chr(9), "")
tables = Replace(tables, "[]", "")
末次
正則表達式是個至少是你的問題。只要列舉一個表可以出現在SQL語句中的所有方式是一個複雜的問題。 BTW。你從來沒有提到你試圖分析哪種SQL。 – JohnFx 2010-02-12 16:58:20
他想要解決的根本問題是什麼。 – 2010-02-12 17:10:52