SQLAlchemy Core – Using Conjunctions Conjunctions are functions in SQLAlchemy module that implement relational operators used in WHERE clause of SQL expressions. The operators AND, OR, NOT, etc., are used to form a compound expression combining two individual logical expressions. A simple example of using AND in SELECT statement is as follows − SELECT * […]

SQLAlchemy Core – Using Functions Some of the important functions used in SQLAlchemy are discussed in this chapter. Standard SQL has recommended many functions which are implemented by most dialects. They return a single value based on the arguments passed to it. Some SQL functions take columns as arguments whereas some are generic. Thefunc keyword […]

SQLAlchemy Core – Multiple Table Deletes In this chapter, we will look into the Multiple Table Deletes expression which is similar to using Multiple Table Updates function. More than one table can be referred in WHERE clause of DELETE statement in many DBMS dialects. For PG and MySQL, “DELETE USING” syntax is used; and for […]