To my surprise, the following two queries returned different results:
SELECT *
FROM foo
JOIN bar
ON bar.id=foo.bar_id
JOIN baz
ON baz.id=foo.baz_id
LEFT JOIN zig
ON zig.foo_id=foo.id;
Tag: middle
iPad – How to display local videos in PhoneGap applications?
How to display videos in the PhoneGap app on the iPad?
I can’t find any references.
I only use it in the mp4 extension, and my video uses the h264 codec to encode the video and AAC enco
iPad – WillrotateTointerfaceorientation does not call from the presentation of ViewController
I use this configured uiviewcontroller on the ipad:
shouldAutorotate(true)
supportedInterfaceOrientations(UIInterfaceOrientationMaskAll)
and in willRotateToInterfaceOrientation Perform some t
Nosql – WHERE clauses on arrays in Azure Documentdb
In such an Azure Documentdb document
{
“id”: “WakefieldFamily”,
“parents”: [
{“familyName”: “Wakefield”, “givenName”: “Robin” },
{“familyName”: “Miller”, “givenName”: “Ben”}
],
“children”:
PostgreSQL – PG_RESTORE: [Archiver] Input file is too short in Postgres
I am trying to dump the database in my local system by using the command:
pg_restore –host=localhost- -port=5432 –dbname=dev_db –no-owner –no-privileges db_dump_new.backup But I get an er
NOSQL – How to deal with multiple to more DynamoDB
I am new to NoSql and DynamoDb, but from RDBMS..
My table is moving from MySql to DynamoDb. I have a table:
Customers (column: cid [ PK], name, contact information)
Hardware (column: hid [PK], n
Nosql – command such as SQL LIMIT in HBIT
Does HBase have any commands similar to SQL LIMIT queries?
I can execute through setStart and setEnd, but I don’t want to iterate all the rows.
hbase> scan’test-table’, {‘LIMIT’ => 5} S
Nosql – Sorting Date in CouchDB View
I have a nested JSON object for the following key states:
{
“2011-01-19 09:41: 00 AM”: “Prototype status application”,
“2011-01-20 09:41:00 AM”: “Play CouchDB”
}
This is a small appli
PowerDesigner writes Name to the PD7 in Comment.
Background:
I used PowerDesigner when developing projects recently. It is very uncomfortable to look at the fields in the database design, because the Chinese people still like to read Chines
Recursive JSON in PostgreSQL
I have the following table in PostgreSQL 9.5 server:
It is worth noting that the position is theoretically infinitely recursive. I need to generate a JSON message from the root position and r