Question

我正在尝试使用用户ID

从jobs表和作业名中记录id

String select = "SELECT jobname FROM " + TABLE_JOBS+ "where userid =" +myid;

Answer 1

"SELECT jobname FROM " + TABLE_JOBS+ "where userid =" +myid;

您需要在表格名称和where之类的关键字：

等标识符之间使用空格

"SELECT jobname FROM " + TABLE_JOBS+ " where userid =" +myid;

Answer 2

您在where子句之前错过了一个空格，因此它会直接附加到表名，并且您实际上没有where子句：

String select = "SELECT jobname FROM " + TABLE_JOBS+ " where userid =" +myid;
// whitespace was missing here -----------------------^