Which SQL clause allows applying aggregate functions (e.g., SUM, AVG) on groups of rows?
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Which SQL command is specifically used to modify the value o…
Which SQL command is specifically used to modify the value of a column in existing records?
Which type of join returns all rows from the right table and…
Which type of join returns all rows from the right table and matching rows from the left table?
Which notation is MOST commonly used to represent hierarchic…
Which notation is MOST commonly used to represent hierarchical data as nested structures in semi-structured models?
Which of the following best describes the role of a schema o…
Which of the following best describes the role of a schema owner in SQL Server?
What is the purpose of a checkpoint in an RDBMS recovery sys…
What is the purpose of a checkpoint in an RDBMS recovery system?
Which of the following statements best describes the purpose…
Which of the following statements best describes the purpose of functional dependencies in the relational model?
Which type of subquery runs once for the entire outer query?
Which type of subquery runs once for the entire outer query?
Which component of an RDBMS is responsible for parsing SQL q…
Which component of an RDBMS is responsible for parsing SQL queries and validating syntax before execution?
Which of the following roles is primarily responsible for bu…
Which of the following roles is primarily responsible for building scalable distributed data pipelines?