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android sqlite数据库在比较内容时使用where子句时出错_Android_Sqlite - Fatal编程技术网
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android sqlite数据库在比较内容时使用where子句时出错

android sqlite

android sqlite数据库在比较内容时使用where子句时出错,android,sqlite,Android,Sqlite,我得到这个错误，请帮助- android.database.sqlite.SQLiteException:靠近“=”：语法错误（代码 1） ：，编译时：从中选择总和（amountinserted） mbudgettablewheredatename='30-09-2017' 代码： 在where子句周围使用空格作为+“where”+您应该按照以下代码编写代码： Cursor cursor = db.rawQuery("SELECT SUM( " +amountinserted + " ) " +

我得到这个错误，请帮助-

android.database.sqlite.SQLiteException:靠近“=”：语法错误（代码 1） ：，编译时：从中选择总和（amountinserted） mbudgettablewheredatename='30-09-2017'

代码：

在where子句周围使用空格作为
+“where”+

您应该按照以下代码编写代码：

Cursor cursor = db.rawQuery("SELECT SUM( " +amountinserted + " ) " + " FROM " +tablename + " **where** " +datename + "='" + rmethod() + "'", null);
查询中“
”和“
where
”之前缺少空格

Cursor cursor = db.rawQuery("SELECT SUM( " +amountinserted + " ) " +
        " FROM " +tablename + " where " +datename + "='" + rmethod() + "'", null);
查询中的间距有问题。请尝试此代码

Cursor cursor = db.rawQuery("SELECT SUM( " +amountinserted + " ) " +
        " FROM " +tablename + " where " +datename + "='" + rmethod() + "'", null);