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15 wrz 2008 · From this link, we can understand IF THEN ELSE in T-SQL: IF EXISTS(SELECT * FROM Northwind.dbo.Customers WHERE CustomerId = 'ALFKI') PRINT 'Need to update Customer Record ALFKI' ELSE PRINT 'Need to add Customer Record ALFKI' IF EXISTS(SELECT * FROM Northwind.dbo.Customers WHERE CustomerId = 'LARSE') PRINT 'Need to update Customer Record LARSE ...
28 maj 2024 · In this article, we explored different options for executing IF-THEN logic in a SQL SELECT statement. These options include using CASE , IIF() , and CHOOSE() . Furthermore, if we want a query that’s used in almost every dialect, we must choose the CASE statement.
9 mar 2021 · This article demonstrates how to select rows of a MySQL table in Python. You’ll learn the following MySQL SELECT operations from Python using a ‘MySQL Connector Python’ module. Execute the SELECT query and process the result set returned by the query in Python. Use Python variables in a where clause of a SELECT query to pass dynamic values.
7 mar 2022 · In this article, we will explain how to use the CASE expression in SELECT SQL statements. We will also explain how to use an alternative approach with an IF clause for MySQL. Prerequisites. For the sake of simplicity, we will use a sample table called users with the following columns:
4 kwi 2022 · The to_sql function requires a table name (String) and connection to the SQLite engine. data = pd.read_csv("data/covid_impact_on_airport_traffic.csv") data.to_sql( 'airport', # Name of the sql table conn, # sqlite.Connection or sqlalchemy.engine.Engine if_exists='replace' )
12 gru 2023 · Creating intricate and comprehensible SQL queries is made easier with Pypika, a robust and user-friendly Python package. In this blog article, we’ll go over the fundamentals of Pypika, examine a few typical use cases, and evaluate its features using concrete examples.
19 paź 2022 · A SQL query contains keywords and references to specific tables and variables. For example, we could have a database with two tables, which looks like this: We can write a query to retrieve the name and age variables from the employee_data table like this: >>> select name, age from employee_data. SQL is not case sensitive, so you’ll often see ...
