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A foreign key is a column (or a set of columns) in one table that refers to the primary key in another table. This relationship enforces referential integrity , ensuring that the value in the foreign key column matches an existing value in the referenced table's primary key column. This mechanism is crucial for relational databases as it defines how data in one table is related to data in another. For example, consider a database with two tables: Orders and Customers .
What was the theme for International Day of Democracy 2022?
The Saansad Adarsh Gram Yojana (SAGY) encourages Members of Parliament (MPs) to adopt villages and develop them as model villages. Which of the followin...
Recently Ministry of Railways has increase it which of the following registration charges for all goods after increasing the charges of wheat and iron o...
Consider the following statements:
I. Shoonya is India’s zero pollution e-mobility campaign.
II. Recently the National Programme on ...
In the Global Innovation Index 2024, India ranked 39th among 133 economies. Which initiative was crucial in fostering entrepreneurship and innovation in...
_____ has announced a five-year business partnership with ServiceNow to invest in and bring new offerings to market that will empower clients to driv...
What percentage of India’s power is still sourced from coal despite the rapid growth of renewables, and what is the planned coal capacity by 2030?
According to the data provided by the government,which state has emerged as the largest buyer of goods and services among all states and Union Territori...
Which state's tourism board has partnered with Starscapes for the Nakshatra Sabha initiative?
India’s energy demand is expected to triple by 2050. What is the primary driver behind this surge in demand, and how is India positioned in terms of g...