在JDBC查詢字符串中的SQL語法錯誤？

Question

我試圖用Java和JDBC時間戳查找表中的SQL，但是當我插入時間戳到查詢字符串我在小時圖中得到一個錯誤的語法時才：

String queryString = "select " + tag + " from WATER_RUNTIME_VALUES 
where Time_Stamp = 2015-06-150 8:58:00.0000000"; 

ResultSet rs = statement.executeQuery(queryString); 

這裏是錯誤：時間值

com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near '10'. at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:216) at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1515) at com.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteStatement(SQLServerStatement.java:792) at com.microsoft.sqlserver.jdbc.SQLServerStatement$StmtExecCmd.doExecute(SQLServerStatement.java:689) at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:5696) at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1715) at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:180) at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:155) at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeQuery(SQLServerStatement.java:616) at bandon.scada.core.InitConn.calculateHourlyTotal(InitConn.java:58) at bandon.scada.core.InitConn.dbConnect(InitConn.java:36) at bandon.scada.core.InitConn.main(InitConn.java:24)

Answer 1

試試這個..

String queryString = "select ' " + tag + " ' from WATER_RUNTIME_VALUES where Time_Stamp = '2015-06-150 8:58:00.0000000'"; 

Answer 2

將單引號轉義空格中2015-06-150 8:58:00.0000000

String queryString = "select " + tag + " from WATER_RUNTIME_VALUES where Time_Stamp = '2015-06-150 8:58:00.0000000'"; 

或者更好地利用PreparedStatement個

Answer 3

日期參數需使用引號，

String queryString = "select " + tag + " from WATER_RUNTIME_VALUES where Time_Stamp = '2015-06-150 8:58:00.0000000'" 

Answer 4

的日期必須使用引號