Liittymäkyselyt
Liittymäkyselyt refers to connection queries or join queries in the context of database systems. These are essential operations used to retrieve data from multiple tables simultaneously. The fundamental principle behind a liittymäkysely is to combine rows from two or more tables based on a related column between them. This allows for the retrieval of more comprehensive information than would be possible by querying individual tables.
The most common type of liittymäkysely is the INNER JOIN, which returns only those rows where the
Liittymäkyselyt are typically expressed using SQL (Structured Query Language) statements. The syntax involves specifying the tables