SQL语句不执行

Question

我正在使用Visual Studo 2010，Win7，C++和Microsoft Access 2010 al 32位。我正在使用Direct ODBC进行连接。第一个SELECT语句执行。 INSERT，SELECT，SELECT和UPDATE未执行。我不认为这是SQL语句的语法。任何帮助表示赞赏。谢谢。

#include <windows.h> 
#include <stdio.h> 
#include <sqlext.h> 

const char* DAM = "Direct ODBC"; 

SQLCHAR szDSN[256] = 
"Driver={Microsoft Access Driver (*.mdb, *.accdb)};DSN='';DBQ=C:\\FILEBLOCK\\Fileblocker.accdb;"; 

main() 
{ 
    HENV hEnv; 
    HDBC hDbc; 

    SQLRETURN rc, TOTAL, QUOTA; 

    SQLSMALLINT iConnStrLength2Ptr; 
    SQLCHAR  szConnStrOut[255]; 

    SQLCHAR* query = (SQLCHAR*)"SELECT tblIP.[IPAddress], tblIP.[IPType], tblIP.[IPStatus], tblIP.[IPMax] FROM tblIP WHERE tblIP.[IPAddress]='173.201.216.2' AND tblIP.[IPType]=3 AND tblIP.[IPStatus]=1 AND tblIP.[IPMax]=0;"; 

/* Number of rows and columns in result set */ 
SQLINTEGER  rowCount = 0; 
SQLSMALLINT  fieldCount = 0, column = 0; 
HSTMT   hStmt; 

/* Allocate an environment handle */ 
rc = SQLAllocEnv(&hEnv); 

/* Allocate a connection handle */ 
rc = SQLAllocConnect(hEnv, &hDbc); 

/* Connect to the 'Fileblocker.accdb' database */ 
rc = SQLDriverConnect(hDbc, NULL, szDSN, _countof(szDSN), 
    szConnStrOut, 255, &iConnStrLength2Ptr, SQL_DRIVER_NOPROMPT); 

if (SQL_SUCCEEDED(rc)) 
{ 
    printf("%s: Successfully connected to database. Data source name: \n %s\n", 
     DAM, szConnStrOut); 

    /* Prepare SQL query */ 
    rc = SQLAllocStmt(hDbc,&hStmt); 
    rc = SQLPrepare(hStmt, query, SQL_NTS); 

    /* Execute the query and create a record set */ 
    rc = SQLExecute(hStmt); 

    /* Loop through the rows in the result set */ 
     rc = SQLFetch(hStmt); 
     while (SQL_SUCCEEDED(rc)) 
     { 
      rc = SQLFetch(hStmt); 
      rowCount++; 
     }; 

     printf("%s: Total Row Count: %d\n", DAM, rowCount); 
     rc = SQLFreeStmt(hStmt, SQL_DROP); 
     if (rowCount >= 1) 
      { 
      printf("PASS\n"); 
      SQLExecute ("INSERT INTO tblDownloads (tblDownloads.[DownloadIP] , tblDownloads.[DownloadCount]) VALUES('173.201.216.2', 1);"); 

      TOTAL = SQLFetch ("SELECT tblDownloads.[DownloadCount] WHERE tblDownloads.[DownloadIP] = '173.201.216.2';"); 
      QUOTA = SQLFetch ("SELECT tblIP.[IPQuota], WHERE tblIPID.[IPAddress] = '173.201.216.2';"); 

      if (TOTAL >= QUOTA) 
       { 
       SQLExecute ("UPDATE tblIP SET tblIP.[IPMax] WHERE tblIP.[IPAddress] = '173.201.216.2');"); 
       } 
     else if (rowCount == 0) 
      { 
      printf("FAIL\n"); 
      rc = SQLFreeStmt(hStmt, SQL_DROP); 
      } 
     //system("pause"); 
    //} 
} 
else 
{ 
    printf("%s: Couldn't connect to %s.\n", DAM, szDSN); 
} 

/* Disconnect and free up allocated handles */ 
SQLDisconnect(hDbc); 
SQLFreeHandle(SQL_HANDLE_DBC, hDbc); 
SQLFreeHandle(SQL_HANDLE_ENV, hEnv); 
} 
} 

Answer 1

这是的SQL语法。
未执行的查询是不是语法正确，所有的人：

查询1：

INSERT INTO tblDownloads (tblDownloads.[DownloadIP] , tblDownloads.[DownloadCount]) VALUES('173.201.216.2', 1); 

列清单后INSERT INTO必须是不带表名作为前缀。
应该是这样的：

INSERT INTO tblDownloads (DownloadIP, DownloadCount) VALUES('173.201.216.2', 1); 

查询2：

SELECT tblDownloads.[DownloadCount] WHERE tblDownloads.[DownloadIP] = '173.201.216.2'; 

缺少FROM条款。
应该是这样的：

SELECT tblDownloads.[DownloadCount] FROM tblDownloads WHERE tblDownloads.[DownloadIP] = '173.201.216.2'; 

查询3：

SELECT tblIP.[IPQuota], WHERE tblIPID.[IPAddress] = '173.201.216.2'; 

同样，没有FROM条款。此外，逗号太多，WHERE子句中的表名是错误的。
应该是这样的：

SELECT tblIP.[IPQuota] FROM tblIP WHERE tblIP.[IPAddress] = '173.201.216.2'; 

查询4：

UPDATE tblIP SET tblIP.[IPMax] WHERE tblIP.[IPAddress] = '173.201.216.2'); 

一个右括号后面没有开括号。
应该看起来像这样：

UPDATE tblIP SET tblIP.[IPMax] WHERE tblIP.[IPAddress] = '173.201.216.2';