Android的SQLite的查询与整型参数 [英] Android SQLite query with integer parameter
问题描述
的<一个href=\"http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html#query%28java.lang.String,%20java.lang.String%5B%5D,%20java.lang.String,%20java.lang.String%5B%5D,%20java.lang.String,%20java.lang.String,%20java.lang.String,%20java.lang.String%29\"相对=nofollow>为SQLiteDatabase.query文档说,selectionArgs两个将被绑定为字符串。
The documentation for SQLiteDatabase.query says that the selectionArgs will be bound as strings.
什么是一个整数参数执行查询的推荐方式?
What is the recommended way to perform a query with an integer parameter?
它是这样的:
int value = 10;
Cursor cursor = database.query(
"TABLE_X",
new String[] { "COLUMN_A", "COLUMN_B" },
"COLUMN_C = " + value,
null,
null,
null,
null);
或者是这样的:
int value = 10;
Cursor cursor = database.query(
"TABLE_X",
new String[] { "COLUMN_A", "COLUMN_B" },
"COLUMN_C = ?",
new String[] { Integer.toString(value) },
null,
null,
null);
或者其他什么东西?
Or something else?
感谢。
推荐答案
与
第二个选项是使用的查询方式的建议方式。
Second option with ?
is the suggested way of using query method.
selectionArgs两个:您可以包括S IN的选择,将由值替换?
从selectionArgs两个,以使他们出现在选择。该
值将被绑定为字符串。
selectionArgs: You may include ?s in selection, which will be replaced by the values from selectionArgs, in order that they appear in the selection. The values will be bound as Strings.
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