My question is if using LIMIT will there be some performance gain in QUERY .
Example:
SELECT descricao FROM produto WHERE id = 9999 LIMIT 1
Has better performance than?
SELECT descricao FROM produto WHERE id = 9999...
The insert of Android returns a row ID according to the documentation,
the row ID of the newly inserted row, or -1 if an error occurred
The row ID corresponds to the primary key, ID , if it exists?
I want to open a straight SQL table in a data.table. When I query with dbGetQuery , what I get is a data.frame. I know I can later turn that data.frame into a data.table easily. But I'd like to skip this step - which on some occasions may...
I would like to prevent deletions in a table in SQLite.
CREATE TRIGGER nao_deletar_tabela BEFORE DELETE ON tabela
BEGIN
SELECT RAISE(IGNORE);
END;
It worked! Whenever a DELETE is executed, nothing happens.
The problem and...
I'm programming for Android and using the native database ( SQLite ).
I want to make a query in the table of products sorted by name, but when doing SELECT like this:
SELECT * FROM produtos ORDER BY nome;
it returns, for exampl...
I have an application in which I have a database using SQLite and an external service using MySQL. Basically it is a task application, in which I can create a task in offline mode . When the user owns internet it will already automatically send...
I have a question about Laravel's Migrations and I believe they can help me.
1 - I created a model with migration by php artisan make:model Evento -m;
2 - In addition to increments and timestamps I added one more field to the migrat...
I would like to help with this issue of saving% multiline in a blob field in SQLite database, because when I add in EditText in the database it saves the texts in Blob Editor with dot end Text Editor of the blob, only saves the fi...
Table declaration
@DatabaseTable(tableName = "alarmes")
public class ListenerAlarme {
@DatabaseField(generatedId = true)
public long id;
@DatabaseField(canBeNull = true)
public Date dataAlarme;
@DatabaseField(canBeNull = true)
public boole...