🔍 SQL Tip: What's the Difference Between COUNT(*) and COUNT(1)? 🧮
If you're curious about how COUNT(*) differs from COUNT(1), here's a quick breakdown using emojis:
1️⃣ Basic Count
COUNT(*) ➡️ 🧮 Counts all rows in a table. COUNT(1) ➡️ 🧮 Also counts all rows by evaluating a constant. 2️⃣ Nulls
Both COUNT(*) and COUNT(1) ➡️ ❓✅ Include rows with NULL values. 3️⃣ Columns Involved
COUNT(*) ➡️ 📦 Doesn’t check any specific column, just counts rows. COUNT(1) ➡️ 🧩 Similarly, evaluates the constant 1 for row count. 4️⃣ Performance
⚡ Both are optimized and perform equally in most databases! 5️⃣ Practical Difference
Both are used to count rows, but COUNT(*) is more commonly seen in SQL queries. 🎯 In most scenarios, they function the same – just a difference in syntax!
Think Like a Data Analyst
🔍 SQL Tip: What's the Difference Between COUNT(*) and COUNT(1)? 🧮
If you're curious about how COUNT(*) differs from COUNT(1), here's a quick breakdown using emojis:
1️⃣ Basic Count
COUNT(*) ➡️ 🧮 Counts all rows in a table.
COUNT(1) ➡️ 🧮 Also counts all rows by evaluating a constant.
2️⃣ Nulls
Both COUNT(*) and COUNT(1) ➡️ ❓✅ Include rows with NULL values.
3️⃣ Columns Involved
COUNT(*) ➡️ 📦 Doesn’t check any specific column, just counts rows.
COUNT(1) ➡️ 🧩 Similarly, evaluates the constant 1 for row count.
4️⃣ Performance
⚡ Both are optimized and perform equally in most databases!
5️⃣ Practical Difference
Both are used to count rows, but COUNT(*) is more commonly seen in SQL queries. 🎯
In most scenarios, they function the same – just a difference in syntax!
1 year ago | [YT] | 1