im curious to know how you get around the hallucinations? for example, for the query: "give me <products / sales / rows> that were created yesterday"

the llm hallucinates as to what "yesterday" means, there are other instances as well where the generated SQL is valid syntax-wise but not in intent. This is especially dangerous for aggregation queries such as MAX, COUNT, etc because it will spit out a number but is it the right number? and the only way to check is to read the SQL itself and verify, which defeats the whole purpose of it.