Stitch Data May 2026

SELECT * FROM crm_table c JOIN transactions t ON c.user_id = t.user_id (OR logic) If one key fails, use another.

df_crm['email'] = df_crm['email'].str.lower().str.strip() df_support['email'] = df_support['email'].str.lower().str.strip() A. Simple Join (Deterministic) Use when you have a perfect matching key.

SELECT * FROM table_a a LEFT JOIN table_b b ON a.email = b.email OR a.phone = b.phone 鈿狅笍 Be careful with OR 鈥� it can cause record multiplication. For complex cases (anonymous + logged-in users), build a mapping table.

SELECT * FROM crm_table c JOIN transactions t ON c.user_id = t.user_id (OR logic) If one key fails, use another.

df_crm['email'] = df_crm['email'].str.lower().str.strip() df_support['email'] = df_support['email'].str.lower().str.strip() A. Simple Join (Deterministic) Use when you have a perfect matching key.