--- a/src/main.cpp	Mon May 07 20:07:39 2018 +0300
+++ b/src/main.cpp	Mon May 07 23:33:52 2018 +0300
@@ -35,6 +35,44 @@
 } settings;
 
 
+//
+// SQL schema / table definitions
+//
+typedef struct
+{
+    QString name;
+    QString schema;
+} SLSQLSchemaDef;
+
+
+static const SLSQLSchemaDef slSQLSchemaData[] =
+{
+    {
+        QStringLiteral("people"),
+        QStringLiteral(
+        "id INTEGER PRIMARY KEY,"
+
+        "first_name VARCHAR("  SL_STR(SQL_LEN_FIRST_NAME) ") NOT NULL,"
+        "last_name VARCHAR("  SL_STR(SQL_LEN_LAST_NAME) ") NOT NULL,"
+        "extra_info VARCHAR("  SL_STR(SQL_LEN_EXTRA_INFO) "),"
+
+        "added DATETIME NOT NULL,"
+        "updated DATETIME NOT NULL"
+        )
+    },
+    {
+        QStringLiteral("transactions"),
+        QStringLiteral(
+        "id INTEGER PRIMARY KEY, "
+        "person INT NOT NULL, "
+        "value REAL, "
+        "added DATETIME NOT NULL"
+        )
+    },
+};
+
+static const int nslSQLSchemaData = sizeof(slSQLSchemaData) / sizeof(slSQLSchemaData[0]);
+
 
 //
 // Convert QString to a double value, replacing comma
@@ -327,53 +365,41 @@
         return 1;
     }
 
-    QSqlQuery query;
-    if (!db.tables().contains("people"))
+    //
+    // Create tables
+    //
+    for (int ntable = 0; ntable < nslSQLSchemaData; ntable++)
     {
-        query.exec(QStringLiteral(
-            "CREATE TABLE people (id INTEGER PRIMARY KEY, "
-            "first_name VARCHAR(%1) NOT NULL, "
-            "last_name VARCHAR(%2) NOT NULL, "
-            "extra_info VARCHAR(%3), "
-            "added DATETIME NOT NULL, "
-            "updated DATETIME NOT NULL)").
-            arg(SQL_LEN_FIRST_NAME).
-            arg(SQL_LEN_LAST_NAME).
-            arg(SQL_LEN_EXTRA_INFO));
+        const SLSQLSchemaDef &table = slSQLSchemaData[ntable];
+        if (!db.tables().contains(table.name))
+        {
+            QSqlQuery query;
+            QString sql =
+                QStringLiteral("CREATE TABLE %1 (%2)").
+                arg(table.name).
+                arg(table.schema);
+
+            query.exec(sql);
 
-        if (!slCheckAndReportSQLError("CREATE TABLE people", query.lastError(), true))
-        {
-            slErrorMsg(
-                QObject::tr("Tietokantataulua ei voitu luoda"),
-                QObject::tr("Virhe: %1<br><br>").
-                arg(db.lastError().text())
-                );
-            return 1;
+            if (!slCheckAndReportSQLError(
+                QStringLiteral("CREATE TABLE %1").arg(table.name),
+                query.lastError(), true))
+            {
+                slErrorMsg(
+                    QObject::tr("Tietokantataulua ei voitu luoda"),
+                    QObject::tr("Virhe: %1<br><br>").
+                    arg(db.lastError().text())
+                    );
+                return 1;
+            }
+
+            query.finish();
         }
     }
 
-    if (!db.tables().contains("transactions"))
-    {
-        query.exec(QStringLiteral(
-            "CREATE TABLE transactions ("
-            "id INTEGER PRIMARY KEY, "
-            "person INT NOT NULL, "
-            "value REAL, "
-            "added DATETIME NOT NULL)"));
-
-        if (!slCheckAndReportSQLError("CREATE TABLE transactions", query.lastError(), true))
-        {
-            slErrorMsg(
-                QObject::tr("Tietokantataulua ei voitu luoda"),
-                QObject::tr("Virhe: %1<br><br>").
-                arg(db.lastError().text())
-                );
-            return 1;
-        }
-    }
-
-    query.finish();
-
+    //
+    // Execute main app
+    //
     SyntilistaMainWindow swin;
     swin.show();
     return sapp.exec();

--- a/src/main.h	Mon May 07 20:07:39 2018 +0300
+++ b/src/main.h	Mon May 07 23:33:52 2018 +0300
@@ -44,6 +44,10 @@
 #define BACKUP_HTTP          1  // HTTP(s) POST to a PHP script
 
 
+// Helper macros
+#define SL_STR_HELPER(x) #x
+#define SL_STR(x) SL_STR_HELPER(x)
+
 
 //
 // Person information record