* PostgreSQL
* MySQL
* SQLite
* Oracle
* Microsoft SQL Server, vb.

Bu örnekte **SQLite** kullanacağız; çünkü tek bir dosya kullanır ve Python’da yerleşik desteği vardır. Yani bu örneği kopyalayıp olduğu gibi çalıştırabilirsiniz.

Daha sonra, production uygulamanız için **PostgreSQL** gibi bir veritabanı sunucusu kullanmak isteyebilirsiniz.

/// tip | İpucu

   * {@link java.io.PrintWriter#format PrintWriter.format}, and related methods. These support the
   * full range of <a
   * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Formatter.html#syntax">format
   * specifiers</a>, and alert you to usage errors by throwing {@link
   * java.util.IllegalFormatException}.
   *

///

Оскільки SQLModel базується на SQLAlchemy, ви можете легко використовувати будь-яку базу даних, яку підтримує SQLAlchemy (а отже й SQLModel), наприклад:

* PostgreSQL
* MySQL
* SQLite
* Oracle
* Microsoft SQL Server тощо

У цьому прикладі ми використаємо **SQLite**, оскільки вона зберігається в одному файлі, а Python має вбудовану підтримку. Тож ви можете скопіювати цей приклад і запустити «як є».

*----+------+------+
| <<<*>>> | Java system properties (see {{{https://docs.oracle.com/javase/8/docs/api/java/lang/System.html#getProperties()}JDK reference}}) | <<<$\{user.home\}>>>\
 | | <<<$\{java.home\}>>> |
*----+------+------+
| <<<*>>> | User properties | <<<$\{foo\}>>> |
*----+------+------+

///

Como o SQLModel é baseado no SQLAlchemy, você pode facilmente usar **qualquer banco de dados suportado** pelo SQLAlchemy (o que também os torna suportados pelo SQLModel), como:

* PostgreSQL
* MySQL
* SQLite
* Oracle
* Microsoft SQL Server, etc.

Neste exemplo, usaremos **SQLite**, porque ele usa um único arquivo e o Python tem suporte integrado. Assim, você pode copiar este exemplo e executá-lo como está.

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import org.jspecify.annotations.Nullable;

/**
 * Static convenience methods that serve the same purpose as Java language <a
 * href="https://docs.oracle.com/javase/8/docs/technotes/guides/language/assert.html">assertions</a>,
 * except that they are always enabled. These methods should be used instead of Java assertions

  // but essentially each line will be a call to a Preconditions method that, but for a documented
  // change would be a compiler error.
  // See https://docs.oracle.com/javase/specs/jls/se25/html/jls-15.html#jls-15.12.2 for the spec on
  // how javac selects overloads
  @SuppressWarnings("null")
  public void overloadSelection() {
    Boolean boxedBoolean = null;

  // but essentially each line will be a call to a Preconditions method that, but for a documented
  // change would be a compiler error.
  // See https://docs.oracle.com/javase/specs/jls/se25/html/jls-15.html#jls-15.12.2 for the spec on
  // how javac selects overloads
  @SuppressWarnings("null")
  public void overloadSelection() {
    Boolean boxedBoolean = null;

 * powerful advantage. Although Java offers certain immutable collection factory methods, such as
 * {@link Collections#singleton(Object)} and <a
 * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Set.html#unmodifiable">{@code
 * Set.of}</a>, we recommend using <i>these</i> classes instead for this reason (as well as for
 * consistency).
 *
 * <h4>Creation</h4>
 *

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import org.jspecify.annotations.Nullable;

/**
 * Static convenience methods that serve the same purpose as Java language <a
 * href="https://docs.oracle.com/javase/8/docs/technotes/guides/language/assert.html">assertions</a>,
 * except that they are always enabled. These methods should be used instead of Java assertions