user="yourusername",password="yourpassword",database="test_db")cursor=db.cursor()#生成并插入数据for_inrange(100):name=fake.name()email=fake.email()age=fake.random_int(min=18,max=80)sql="INSERT INTO users (name, email, age) VALUES (%s, %s, ...
Generates random data with given schema. Allows to populate test tables with data. Not all types are supported. generateRandom(['name TypeName[, name TypeName]...',[,'random_seed'[,'max_string_length'[,'max_array_length']]]) Arguments...
Let's say you have a database of customers and you initiated a contest wherein you determine the winners by randomly selecting 5 customers from your database. How would you go about selecting 5 random records from your customers table?
dbgen is a program to quickly generate random SQL dump of a table following a given set of expressions. Usage Download and install Table generator dbgen Schema generator dbschemagen Reference Template reference Advanced template features Database generator dbdbgen dbdbgen tutorial dbdbgen reference WASM...
Next step is to generate the random data. For this, select a table from Current Table drop down for which you want to fill the data and choose what data to be generated for every column. You can follow below steps. i) Select the type of data for each column. For Eg:- the birthdat...
RandomNumber --- 403663676 Doing the same SELECT statement from the [dbo].[Customers] table of the Northwind database but using the system function NEWID: SELECT TOP 10 ABS(CAST(CAST(NEWID() AS VARBINARY) AS INT)) AS [RandomNumber], [CustomerID],...
Password generation in the database may be questionable but sometimes a requirement.First things first, make sure your password column is NOT NULL and has a CHECK ([Password] <> '') on it.The easiest way I can think to generate a fairly simple random password: LEFT(CAST(NEWID() AS ...
Figure 5. Random emails 6. Generate country names randomly This last example will show how to generate random country names. We will use the table Person.CounryRegion from the adventureworks database and we will add an id using the Row_number function: 1 2 3 4 5 6 SELECT ROW_NUMBER(...
Generate less verbose SQL output. Default is to generate one echo when starting to fill a table. --seed SEED or -S SEED Seed overall random generation with provided string. Default uses OS supplied randomness or current time. --size SIZE ...
SELECT floor(random()* (200-100+ 1) + 100) rand FROM generate_series(1,5); Output: rand --- 152 187 186 151 190 (5 rows) 2) Generating test data First, create a table called employees: CREATE TABLE employees( id INT GENERATED ALWAYS AS IDENTITY, name VARCHAR(100) NOT NULL, age...