diff --git a/scripts/restore.sh b/scripts/restore.sh
new file mode 100755
index 0000000..9d8aac2
--- /dev/null
+++ b/scripts/restore.sh
@@ -0,0 +1,233 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+ts() { date +"%Y-%m-%d %H:%M:%S"; }
+log() { echo "[$(ts)] [INFO] $*"; }
+warn(){ echo "[$(ts)] [WARN] $*" >&2; }
+err() { echo "[$(ts)] [ERROR] $*" >&2; }
+die() { err "$*"; exit 1; }
+
+usage() {
+  cat <<'EOF'
+Usage:
+  ./scripts/restore.sh <backup_file.bak> <target_db_name> [options]
+
+Options:
+  --replace                 Overwrite existing database.
+  --compat <level>          Set compatibility level after restore (e.g. 170).
+  --recovery <model>        Set recovery model after restore: SIMPLE|FULL|BULK_LOGGED
+                            Default: SIMPLE (recommended for local dev).
+  --no-tuning               Skip post-restore tuning (compat/recovery changes).
+
+Examples:
+  ./scripts/restore.sh KundenDB.bak KundenDB
+  ./scripts/restore.sh KundenDB.bak KundenDB --replace
+  ./scripts/restore.sh KundenDB.bak KundenDB --compat 170 --recovery SIMPLE
+  ./scripts/restore.sh KundenDB.bak KundenDB --no-tuning
+
+Notes:
+- Put the .bak into ./backup/ (host) so it appears in the container as:
+    /var/opt/mssql/backup/<backup_file.bak>
+- Requires a running, healthy container named "mssql2025".
+EOF
+}
+
+dump_logs() {
+  warn "Container logs (last 250 lines):"
+  docker logs --tail=250 mssql2025 2>/dev/null || true
+}
+
+on_error() {
+  local code=$?
+  err "Restore failed (exit code=$code)."
+  dump_logs
+  exit "$code"
+}
+trap on_error ERR
+
+cd "$(dirname "$0")/.."
+
+# -------- Preflight --------
+command -v docker >/dev/null 2>&1 || die "docker not found in PATH."
+docker info >/dev/null 2>&1 || die "docker daemon not reachable."
+
+[[ -f .env ]] || die "Missing .env. Create it first: cp .env.example .env"
+set -a
+# shellcheck disable=SC1091
+source .env
+set +a
+[[ -n "${MSSQL_SA_PASSWORD:-}" ]] || die "MSSQL_SA_PASSWORD is empty in .env"
+
+# -------- Args --------
+[[ $# -ge 2 ]] || { usage; exit 1; }
+
+bak_file="$1"
+target_db="$2"
+shift 2
+
+replace="0"
+compat_level=""
+recovery_model="SIMPLE"
+do_tuning="1"
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --replace)
+      replace="1"; shift ;;
+    --compat)
+      [[ $# -ge 2 ]] || die "--compat requires a value (e.g. 170)"
+      compat_level="$2"
+      shift 2 ;;
+    --recovery)
+      [[ $# -ge 2 ]] || die "--recovery requires SIMPLE|FULL|BULK_LOGGED"
+      recovery_model="$2"
+      shift 2 ;;
+    --no-tuning)
+      do_tuning="0"; shift ;;
+    -h|--help)
+      usage; exit 0 ;;
+    *)
+      die "Unknown argument: $1 (use --help)" ;;
+  esac
+done
+
+# Validate recovery model
+case "$recovery_model" in
+  SIMPLE|FULL|BULK_LOGGED) ;;
+  *)
+    die "Invalid --recovery value: '$recovery_model'. Use SIMPLE|FULL|BULK_LOGGED." ;;
+esac
+
+# Validate compat level if provided (basic numeric check)
+if [[ -n "$compat_level" ]]; then
+  [[ "$compat_level" =~ ^[0-9]+$ ]] || die "Invalid --compat value: '$compat_level' (must be numeric, e.g. 170)."
+fi
+
+# Container must be running and healthy
+if ! docker ps --format '{{.Names}}' | grep -qx 'mssql2025'; then
+  die "Container mssql2025 is not running. Start it first: ./scripts/start.sh"
+fi
+health="$(docker inspect -f '{{.State.Health.Status}}' mssql2025 2>/dev/null || true)"
+[[ "$health" == "healthy" ]] || die "Container is not healthy (health=$health). Run ./scripts/start.sh"
+
+# Backup must exist on host
+host_bak_path="./backup/$bak_file"
+[[ -f "$host_bak_path" ]] || die "Backup file not found: $host_bak_path"
+
+container_bak_path="/var/opt/mssql/backup/$bak_file"
+
+log "Restore requested:"
+log "  backup   : $host_bak_path  (container: $container_bak_path)"
+log "  target   : $target_db"
+log "  replace  : $replace"
+log "  tuning   : $do_tuning (recovery=$recovery_model${compat_level:+, compat=$compat_level})"
+
+# -------- Get logical file names from backup --------
+log "Reading FILELISTONLY..."
+filelist=$(
+  docker exec -i mssql2025 /opt/mssql-tools18/bin/sqlcmd \
+    -S localhost -U sa -P "$MSSQL_SA_PASSWORD" \
+    -W -s"|" -h -1 \
+    -Q "SET NOCOUNT ON; RESTORE FILELISTONLY FROM DISK = N'$container_bak_path';" \
+    < /dev/null \
+    | tr -d '\r'
+)
+
+[[ -n "$filelist" ]] || die "RESTORE FILELISTONLY returned no output. Is the .bak readable?"
+
+data_logical="$(echo "$filelist" | awk -F'|' '$3 ~ /^D$/ {print $1; exit}')"
+log_logical="$(echo "$filelist"  | awk -F'|' '$3 ~ /^L$/ {print $1; exit}')"
+
+[[ -n "$data_logical" ]] || die "Could not detect data logical name (Type=D) from FILELISTONLY."
+[[ -n "$log_logical"  ]] || die "Could not detect log  logical name (Type=L) from FILELISTONLY."
+
+log "Detected logical names:"
+log "  DATA: $data_logical"
+log "  LOG : $log_logical"
+
+# Destination files in container
+dest_mdf="/var/opt/mssql/data/${target_db}.mdf"
+dest_ldf="/var/opt/mssql/data/${target_db}_log.ldf"
+
+# -------- Build RESTORE DATABASE command --------
+with_opts="MOVE N'$data_logical' TO N'$dest_mdf',
+     MOVE N'$log_logical'  TO N'$dest_ldf',
+     STATS = 5"
+if [[ "$replace" == "1" ]]; then
+  with_opts="$with_opts,
+     REPLACE"
+fi
+
+restore_sql=$(
+  cat <<SQL
+RESTORE DATABASE [$target_db]
+FROM DISK = N'$container_bak_path'
+WITH
+     $with_opts;
+SQL
+)
+
+log "Starting restore (large DBs can take a while)..."
+docker exec -i mssql2025 /opt/mssql-tools18/bin/sqlcmd \
+  -S localhost -U sa -P "$MSSQL_SA_PASSWORD" \
+  -b -Q "$restore_sql" < /dev/null
+
+log "Restore finished ✅"
+
+# -------- Post-restore info --------
+log "Post-restore database info:"
+info_sql=$(
+  cat <<SQL
+SET NOCOUNT ON;
+SELECT
+  name,
+  state_desc,
+  recovery_model_desc,
+  compatibility_level
+FROM sys.databases
+WHERE name = N'$target_db';
+SQL
+)
+
+docker exec -i mssql2025 /opt/mssql-tools18/bin/sqlcmd \
+  -S localhost -U sa -P "$MSSQL_SA_PASSWORD" \
+  -W -h -1 -Q "$info_sql" < /dev/null \
+  | tr -d '\r' \
+  | while read -r line; do
+      [[ -n "$line" ]] && log "  $line"
+    done
+
+# -------- Optional tuning --------
+if [[ "$do_tuning" == "1" ]]; then
+  # Set recovery model (default SIMPLE)
+  log "Applying recovery model: $recovery_model"
+  tune_sql="ALTER DATABASE [$target_db] SET RECOVERY $recovery_model WITH NO_WAIT;"
+  docker exec -i mssql2025 /opt/mssql-tools18/bin/sqlcmd \
+    -S localhost -U sa -P "$MSSQL_SA_PASSWORD" \
+    -b -Q "$tune_sql" < /dev/null
+
+  # Set compatibility level if requested
+  if [[ -n "$compat_level" ]]; then
+    log "Applying compatibility level: $compat_level"
+    compat_sql="ALTER DATABASE [$target_db] SET COMPATIBILITY_LEVEL = $compat_level;"
+    docker exec -i mssql2025 /opt/mssql-tools18/bin/sqlcmd \
+      -S localhost -U sa -P "$MSSQL_SA_PASSWORD" \
+      -b -Q "$compat_sql" < /dev/null
+  fi
+
+  log "Tuning applied ✅"
+else
+  warn "Post-restore tuning skipped (--no-tuning)."
+fi
+
+# -------- Final info --------
+log "Final database info:"
+docker exec -i mssql2025 /opt/mssql-tools18/bin/sqlcmd \
+  -S localhost -U sa -P "$MSSQL_SA_PASSWORD" \
+  -W -h -1 -Q "$info_sql" < /dev/null \
+  | tr -d '\r' \
+  | while read -r line; do
+      [[ -n "$line" ]] && log "  $line"
+    done
+
+log "Done."
diff --git a/sql/playground.sql b/sql/playground.sql
new file mode 100644
index 0000000..5a59999
--- /dev/null
+++ b/sql/playground.sql
@@ -0,0 +1,53 @@
+/* ------------------------------------------------------------
+   sql/playground.sql
+   Local playground for SQL Server 2025 in Docker
+   ------------------------------------------------------------ */
+
+-- Basic server info
+SELECT
+  @@SERVERNAME   AS ServerName,
+  @@VERSION      AS SqlServerVersion,
+  SYSDATETIME()  AS ServerTimeLocal,
+  SYSUTCDATETIME() AS ServerTimeUtc;
+
+-- Switch to your dev database (created by seed/migrations)
+IF DB_ID(N'DevDb') IS NULL
+BEGIN
+  PRINT 'Database DevDb does not exist yet. Run: ./scripts/seed.sh and ./scripts/migrate.sh';
+  RETURN;
+END
+GO
+
+USE DevDb;
+GO
+
+SELECT DB_NAME() AS CurrentDatabase;
+GO
+
+-- Check if example table exists and query it
+IF OBJECT_ID(N'dbo.Customer', N'U') IS NULL
+BEGIN
+  PRINT 'Table dbo.Customer does not exist yet. Run: ./scripts/migrate.sh';
+END
+ELSE
+BEGIN
+  PRINT 'dbo.Customer exists. Running sample queries...';
+
+  SELECT TOP (10) *
+  FROM dbo.Customer
+  ORDER BY CustomerId DESC;
+
+  SELECT COUNT(*) AS CustomerCount
+  FROM dbo.Customer;
+END
+GO
+
+/* ------------------------------------------------------------
+   Scratch area (write your own queries below)
+   ------------------------------------------------------------ */
+
+-- Example:
+-- SELECT TOP (100) *
+-- FROM dbo.Customer
+-- ORDER BY CustomerId;
+
diff --git a/sql/test.sql b/sql/test.sql
new file mode 100644
index 0000000..ef4b369
--- /dev/null
+++ b/sql/test.sql
@@ -0,0 +1,3 @@
+SELECT @@VERSION AS Version;
+SELECT DB_NAME() AS CurrentDb;
+SELECT GETDATE() AS CurrentDateTime;
\ No newline at end of file