-- 2. READ COMMITTED - here we don't have dirty reads, but do have unrepeatable or inconsistent reads. -- 3. REPEATABLE READ - this is the DEFAULT isolation level in mysql, which solves most of the ...
Follow this step-by-step guide to install PostgreSQL, load data, connect to a database, and execute SQL queries including table joins PostgreSQL is an open-source, object-relational (also called ...
Master SQL from basics to advanced topics with this structured roadmap, covering queries, joins, subqueries, indexing, transactions, and performance tuning. 🎯 Stay on Track with Visual Progress ...
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