java - SQLite 查询不适用于连接字符串

Question

这是我使用 SQLite 的 android 应用程序的代码：

String wordInQuotes = "\"" + inputWord + "\"";
String query = "select * from table where col = " +wordInQuotes + ";";
Cursor cursor = database.rawQuery(query, null);

这没有给我任何结果。而如果我删除连接，

 String query = "select * from table where col = \"apple\" ;";

它完美地工作。那么如何编写一个可以动态替换列值的查询呢？

Answer 1

试试这个它会工作

精确输入

String query = "select * from table where col = '" +inputword + "'";

输入从结尾开始

String query = "select * from table where col = '" +inputword + "%'";

输入从起点开始

String query = "select * from table where col = '%" +inputword + "'";

输入包含列中的任何位置

String query = "select * from table where col = '%" +inputword + "%'";

执行查询

Cursor cursor = database.rawQuery(query, null);

Answer 2

String query = "select * from table where col = \""+value+"\" ";

Answer 3

String query = "select * from table where col ='" +inputWord + "'";