# SQL Dialect Cheat Sheet

| Feature | Access | SQLite | SQL Server | Postgres |
| :--- | :--- | :--- | :--- | :--- |
| Row limit | `SELECT TOP n` | `LIMIT n` | `SELECT TOP (n)` | `LIMIT n` |
| Null coalesce | `IIF(x Is Null, y, x)` | `IFNULL(x, y)` | `ISNULL(x, y)` | `COALESCE(x, y)` |
| Concatenation | `&` | `||` | `+` or `CONCAT()` | `||` |
| Date literal | `#YYYY-MM-DD#` | `'YYYY-MM-DD'` | `'YYYY-MM-DD'` | `'YYYY-MM-DD'` |
| Boolean | `True`/`False` (-1/0) | `1`/`0` | `1`/`0` | `TRUE`/`FALSE` |