SQLite查询不适用于串联字符串

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);

这没有结果。 而如果我删除串联，

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

它完美地工作。 那么，如何编写查询以动态替换列值呢？

Answer 1

试试这个会起作用

准确输入

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

从头开始输入

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

从起点开始输入

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 + "'";