我有一個帶有 4 列的 SQL 資料庫的 Android 應用程式。我想搜索資料庫中的所有 4 列，但是我只能搜索 1 列。我不太確定如何讓它搜索所有 4 列。
顯示所有 4 列，但我只能搜索一個。我似乎無法讓它搜索所有 4 列。
我用來讓它搜索一列的代碼是
@SuppressLint("Range")
public List<Data> getDataByVARIETY (String VARIETY) {
variety = VARIETY;
SQLiteDatabase db = getReadableDatabase();
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
String[] sqlSelect = {"VARIETY", "COMMODITY", "PLU", "BOTANICAL"};
String tableName = "data";
qb.setTables(tableName);
//This will query : Select * from Data where Variety %PATTERN%"
Cursor cursor = qb.query(db, sqlSelect, "VARIETY LIKE ?", new String[]{"%" VARIETY "%"}, null, null, null);
List<Data> result = new ArrayList<>();
if (cursor.moveToFirst()) {
do {
Data data = new Data();
data.setCOMMODITY(cursor.getString(cursor.getColumnIndex("COMMODITY")));
data.setVARIETY(cursor.getString(cursor.getColumnIndex("VARIETY")));
data.setPLU(cursor.getString(cursor.getColumnIndex("PLU")));
data.setBOTANICAL(cursor.getString(cursor.getColumnIndex("BOTANICAL")));
result.add(data);
} while (cursor.moveToNext());
}
return result;
}
uj5u.com熱心網友回復：
所以我所要做的就是改變這個
qb.setTables(tableName);
//This will query : Select * from Data where Variety %PATTERN%"
Cursor cursor = qb.query(db, sqlSelect, "VARIETY LIKE ?", new String[]{"%" VARIETY "%"}, null, null, null);
對此
qb.setTables(tableName);
//This will query : Select * from Data where Variety %PATTERN%"
String conditions = "COMMODITY LIKE ? OR PLU LIKE ? OR VARIETY LIKE ?";
String par;
par = "%" COMMODITY "%";
Cursor cursor = db.query(tableName, sqlSelect, conditions, new String[]{par, par, par}, null, null, null);
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