I wanted to do query in table for field id with some vales like 1,5,4,11 which will come from previous screen according to selection.
cursor = database.query(tablename,
new String[] { "TopName" }, "id =?", new String[]{"2,3"}, null, null, null);
When I do like this, I am getting cursor count 0, with new String[]{"2"} I am getting value I want for all ids with values in string array like OR which have value in that column.
You can use the IN operator like this,
cursor = database.query(tablename, new String[] {"TopName"}, "id IN(?,?)",
new String[]{"2","3"}, null, null, null);
The correct syntax for using the IN operator in Android's ContentProvider is as follows:
cursor = database.query(contentUri, projection, "columname IN(?,?)", new String[]{"value1" , "value2"}, sortOrder);
Alternatively, we can also use,
cursor = database.query(contentUri, projection, "columnName IN(?)", new String[] {" 'value1' , 'value2' "}, sortOrder);
Note that we need single quotes around each comma-separated value in the arguments for second case, otherwise the whole string will be treated as one value for the column. The SQL will treat it as
SELECT * FROM table WHERE columnName IN ('value1,value2')
instead of the correct syntax
SELECT * FROM table WHERE columnName IN ('value1' , 'value2')
VolkerK was first to correctly answer the question, but for the sake of completeness here is a full example of how to use the IN operator:
cursor = database.query(tablename,
new String[] { "TopName" }, "id IN (?)", new String[]{"2,3"}, null, null, null);
For the SelectionArgs section I think you need to change:
new String[]{"2,3"}
To
new String[]{"2","3"}
? fields. VolkerK's answer is correct.
I would like to put this here since a compendium of answers helped me putting multiple (unknown) values in SQLiteDatabase.query() and the one-question-mark did not work for me. Hope helps anyone
// API > 24
protected String attributesAsMarks(String[] attributes) {
List<String> marks = Collections.nCopies(attributes.length, "?");
return marks.stream().collect(Collectors.joining(","));
}
// I'm using API > 15
protected String attributesAsMarks(String[] attributes) {
StringBuilder sb = new StringBuilder();
String separator = "";
for (String s : attributes) {
if (s == null) continue;
sb.append(separator).append("?");
separator = ",";
}
return sb.toString();
}
Thanks to
