I need a real-time database for inserting at least 500fields per second. (I have been selected TimeScaleDB (Postgresql Extension) for my purpose, currently). So, the matrix of the table will be 500(Fields)x86400(Rows).
This means that for a 500 double-precision field it will be around 500*8bytes=4000bytes which for 86400rows it will be 345,600,000bytes (345.6M).
I know a software which it is recording the same structure of data and the final daily volume of its database is only 84M~85M. Its Extension is *.tag so, i think it is a DataFlex database. It is not a free database and i also never used it.
1- Which free database is the best to use for real-time data storing and querying (at the moment of storing) based on your experience or knowledge?
2- Is there any database to have such a volume or even less for this size of data?
Thank you for your Help.
It is not a good idea to use the Source argument of the Open method to perform an action query that does not return records because there is no easy way to determine whether the call succeeded. The Recordset returned by such a query will be closed. To perform a query that does not return records, such as a SQL INSERT statement, call the Execute method of a Command object or the Execute method of a Connection object instead.
Now in the table is an autoincrement ID which I need for use in a linked table.
Does the pCmd->Execute() return a recordset and if so what's in it?
Or is there another way to get the data of the just added record?
I need help to know the following:
1) whether the table pets, table users and table orders below is correct
Create table pets (
petId INTEGER IDENTITY PRIMARY KEY,
NAME VARCHAR(30) NOT NULL,
PHOTOURL VARCHAR(30) NOT NULL,
TAGS VARACHR(20) NOT NULL,
PRIMARY KEY (petId),
FOREIGN KEY (userId) REFERENCES Users(userId)
CREATE TABLE Orders (
OrderID int PRIIMARY KEY,
OrderNumber int NOT NULL,
quantity int NOT NULL,
shipDate DATE NOT NULL,
STATUS VARCHAR(30) NOT NULL, // can we use Enum here ?
PRIMARY KEY (OrderID),
FOREIGN KEY (petId) REFERENCES Pets(petId)
Not sure to include User based on the Swagger document
CREATE TABLE Users(
UserID int PRIMARY KEY,
UserName VARCHAR(30) NOT NULL,
FirstName VARCHAR(30) NOT NULL,
LastName VARCHAR(30) NOT NULL,
EMAIL VARCHAR(30) NOT NULL,
PASSWORD VARCHAR(30) NOT NULL,
PHONE VARCHAR(30) NOT NULL,
UserStatus VARCHAR(30) NOT NULL,
2) whether store entity is needed ?
Please help me on above as I am not good with DB and have problem in understanding swagger documentation.
3) If I were to use JPA data in Spring, do I use Custom query for querying the status ?
I need to build a windows app for documents archiving based on SQL server. I'm not sure if it better to store the files inside the database or as regular files. There will be thousands of files, and each file can reach upto 10MB so the total size could be around couple of TB's.
It's usually preferable to store the files in the file system, and store the paths in the database. But you might want to consider using file tables or filestream access instead, if they're available on your server.
I HAVE TO MANAGE INVENTORY
1)PARENTS (1 PK)
2)CHILD (10 PK)
CHILD NEVER SHOW MORE THEN 9 TO 0
IF I UPDATE INVENTORY FORM PARENTS OR CHILD UPDATE AUTOMATICALLY IN A PARENTS
ID I ADD INVENTORY ON A CHILD 15 WE CAN GET RESULT LIKE THAT
THEY SHOW LIKE THAT
1. Don't type in all CAPS. It makes it look like you are yelling and is considered rude.
2. You have not asked a question.
3. All you have to do is write code to do this. When you update inventory then update the other fields too.
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