Suppose I have a table:
Name, status, timestamp I want to choose matching Status =’active’ rows, but only those rows with the latest timestamp are selected. So if there are rows like this:
Category: Database
The database is a warehouse that organizes, stores and manages data according to the data structure. It was created more than 60 years ago. With the development of information technology and the market, especially after the 1990s, data management is no longer just It is to store and manage data, and transform it into various data management methods required by users. There are many types of databases, from the simplest tables that store various data to large-scale database systems that can store massive amounts of data. They have been widely used in all aspects.
SQLite tutorial
Are there any good tutorials/books on how to use Cql’s sqlite? I recommend Mike Owens’ book: The Definitive Guide to SQLite(1st Edn,2006). This is a very Good book.
There are also second e
NVARCHAR (MAX) in SQLite
I create a table in Sqlite, which contains a column with the maximum length:
create table [Log] (
Id int identity not null
constraint PK_Log_Id primary key,
Data nvarchar (max) null
) But
SQLite uses SQLite-Net to add Windows 8 Metro C #
I am using C# and SQLite as the database of Windows-8-Metro-App. I want to use Join-Command, but I don’t know how to read the given return data. Function:
db.Query(“SELECT * FROM Person, Job
SQLite – insert the data into the blob
I am trying to use SQLite3 shell to insert binary data into blobs, which means regular SQL statements. This is my table:
CREATE TABLE MYTABLE
(ID INTEGER,
BINDATA BLOB NOT NULL,
SOMEFK INT
Should I index DateTime in SQLITE?
Is it possible to find a date faster> an appointment? Generally yes, but please remember that SQLite uses only one index per table (except for the OR clause ). Always use EXPLAIN to understand h
PowerDesigner Settings Fields Unsigned Int
The first step, double-click the field
The second step, select the mysql tab
The third step, set the field unsigned attribute
How do I retrieve data from SQLITE to VB6?
I use SQLite3 ODBC driver as my connection string,
Dim conn As ADODB.Connection Set conn = New ADODB.Connection
Dim rs As New ADODB.Recordset
Set conn = New ADODB.Connection
conn.ConnectionSt
Implement database import and export using PowerDesigner
Get the physical model from the existing database 1. Open PowerDesigner, File –> Model –> Create a new physical data model, model name is self-designed, DBMS select MySQL5.0. 2. Database –> Conn
PowerDesigner16.5 Reverse Engineering, export PDM from the remote oracle11g database
Tools used in this article:
1. Remote database Oracle11g
2, powerdesigner16.5
First step:
Enter the model name and select the database Oracle11g
Step 2: Select the cur