PostgreSQL - Common Table Expressions
Which keyword is used to start defining multiple CTEs in a PostgreSQL query?
Which keyword is used to start defining multiple CTEs in a PostgreSQL query?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the syntax for CTEs
CTEs always start with the keyword WITH in PostgreSQL.Step 2: Confirm multiple CTEs use the same keyword
Multiple CTEs are separated by commas but all start after WITH.Final Answer:
WITH -> Option BQuick Check:
CTE start keyword = WITH [OK]
Quick Trick: CTEs always begin with WITH keyword [OK]
Common Mistakes:
- Using SELECT or FROM to start CTEs
- Confusing JOIN with CTE syntax
- Omitting the WITH keyword
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