Android编程query的orderBy参数怎么填?

发布网友发布时间：2023-08-11 06:31

共2个回答

热心网友时间：2024-11-30 17:52

String orderBy. 你用的是 3，

return dbYx.query(YX_TABLE, new String[]{ KEY_YX_ID, KEY_YX_NAME, KEY_YX_NO, KEY_YX_VALUE}, null, null, null, null, null);

1. query(String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy, String limit)

2. query(boolean distinct, String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy, String limit, CancellationSignal cancellationSignal)

3. query(String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy)

4. query(boolean distinct, String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy, String limit)

热心网友时间：2024-11-30 17:52

orderby 的 null 换成 “列名空格排序方式”

排序方式有desc和asc两种
注意引号要加