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。而如果我删除串联，

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

它工作得很好。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，它会起作用

精确输入

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

输入从结束开始

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

从起点开始输入

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

对于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);