diff --git a/cmd/export_sql/main.go b/cmd/export_sql/main.go
new file mode 100644
index 0000000..4a40c94
--- /dev/null
+++ b/cmd/export_sql/main.go
@@ -0,0 +1,323 @@
+package main
+
+import (
+	"database/sql"
+	"encoding/hex"
+	"flag"
+	"fmt"
+	"hr_receiver/config"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+var defaultTables = []string{"users", "user_region_bindings", "kindergartens"}
+
+func main() {
+	var (
+		tablesArg string
+		outputArg string
+		schemaArg string
+	)
+
+	flag.StringVar(&tablesArg, "tables", "", "Comma-separated table names to export. Default: users,user_region_bindings,kindergartens")
+	flag.StringVar(&outputArg, "output", "", "Output .sql file path. Default: export_<timestamp>.sql")
+	flag.StringVar(&schemaArg, "schema", "public", "Database schema name")
+	flag.Parse()
+
+	tables := resolveTables(tablesArg, flag.Args())
+	if len(tables) == 0 {
+		fmt.Fprintln(os.Stderr, "no tables specified")
+		os.Exit(1)
+	}
+
+	config.InitConfig()
+	config.ConnectDB()
+
+	outputPath := outputArg
+	if outputPath == "" {
+		outputPath = fmt.Sprintf("export_%s.sql", time.Now().Format("20060102_150405"))
+	}
+
+	if err := os.MkdirAll(filepath.Dir(outputPath), 0o755); err != nil && filepath.Dir(outputPath) != "." {
+		fmt.Fprintf(os.Stderr, "create output directory failed: %v\n", err)
+		os.Exit(1)
+	}
+
+	file, err := os.Create(outputPath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "create output file failed: %v\n", err)
+		os.Exit(1)
+	}
+	defer file.Close()
+
+	if err := exportTables(file, schemaArg, tables); err != nil {
+		fmt.Fprintf(os.Stderr, "export failed: %v\n", err)
+		os.Exit(1)
+	}
+
+	fmt.Printf("exported %d table(s) to %s\n", len(tables), outputPath)
+}
+
+func resolveTables(tablesArg string, positional []string) []string {
+	if len(positional) > 0 {
+		return dedupeNonEmpty(positional)
+	}
+	if strings.TrimSpace(tablesArg) == "" {
+		return append([]string(nil), defaultTables...)
+	}
+	return dedupeNonEmpty(strings.Split(tablesArg, ","))
+}
+
+func dedupeNonEmpty(items []string) []string {
+	result := make([]string, 0, len(items))
+	seen := make(map[string]struct{}, len(items))
+	for _, item := range items {
+		value := strings.TrimSpace(item)
+		if value == "" {
+			continue
+		}
+		if _, ok := seen[value]; ok {
+			continue
+		}
+		seen[value] = struct{}{}
+		result = append(result, value)
+	}
+	return result
+}
+
+func exportTables(w io.Writer, schema string, tables []string) error {
+	db, err := config.DB.DB()
+	if err != nil {
+		return err
+	}
+
+	header := []string{
+		"-- Generated by cmd/export_sql",
+		fmt.Sprintf("-- Time: %s", time.Now().Format(time.RFC3339)),
+		fmt.Sprintf("-- Schema: %s", schema),
+		fmt.Sprintf("-- Tables: %s", strings.Join(tables, ", ")),
+		"",
+	}
+	if _, err := io.WriteString(w, strings.Join(header, "\n")); err != nil {
+		return err
+	}
+
+	for _, table := range tables {
+		columns, err := getColumns(db, schema, table)
+		if err != nil {
+			return fmt.Errorf("read columns for %s: %w", table, err)
+		}
+		if len(columns) == 0 {
+			return fmt.Errorf("table %s not found or has no columns", table)
+		}
+
+		orderBy, err := getPrimaryKeyColumns(db, schema, table)
+		if err != nil {
+			return fmt.Errorf("read primary key for %s: %w", table, err)
+		}
+
+		if _, err := fmt.Fprintf(w, "-- Table: %s\n", table); err != nil {
+			return err
+		}
+
+		if err := exportTableData(w, db, schema, table, columns, orderBy); err != nil {
+			return err
+		}
+
+		if _, err := io.WriteString(w, "\n"); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func getColumns(db *sql.DB, schema, table string) ([]string, error) {
+	const query = `
+SELECT column_name
+FROM information_schema.columns
+WHERE table_schema = $1 AND table_name = $2
+ORDER BY ordinal_position
+`
+	rows, err := db.Query(query, schema, table)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var columns []string
+	for rows.Next() {
+		var column string
+		if err := rows.Scan(&column); err != nil {
+			return nil, err
+		}
+		columns = append(columns, column)
+	}
+	return columns, rows.Err()
+}
+
+func getPrimaryKeyColumns(db *sql.DB, schema, table string) ([]string, error) {
+	const query = `
+SELECT a.attname
+FROM pg_index i
+JOIN pg_class c ON c.oid = i.indrelid
+JOIN pg_namespace n ON n.oid = c.relnamespace
+JOIN pg_attribute a ON a.attrelid = c.oid AND a.attnum = ANY(i.indkey)
+WHERE i.indisprimary
+  AND n.nspname = $1
+  AND c.relname = $2
+ORDER BY array_position(i.indkey, a.attnum)
+`
+	rows, err := db.Query(query, schema, table)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var columns []string
+	for rows.Next() {
+		var column string
+		if err := rows.Scan(&column); err != nil {
+			return nil, err
+		}
+		columns = append(columns, column)
+	}
+	return columns, rows.Err()
+}
+
+func exportTableData(w io.Writer, db *sql.DB, schema, table string, columns, orderBy []string) error {
+	query := fmt.Sprintf(
+		`SELECT %s FROM %s.%s`,
+		joinIdentifiers(columns),
+		quoteIdentifier(schema),
+		quoteIdentifier(table),
+	)
+	if len(orderBy) > 0 {
+		query += " ORDER BY " + joinIdentifiers(orderBy)
+	}
+
+	rows, err := db.Query(query)
+	if err != nil {
+		return fmt.Errorf("query rows for %s: %w", table, err)
+	}
+	defer rows.Close()
+
+	values := make([]any, len(columns))
+	scanTargets := make([]any, len(columns))
+	for i := range values {
+		scanTargets[i] = &values[i]
+	}
+
+	rowCount := 0
+	for rows.Next() {
+		clear(values)
+		if err := rows.Scan(scanTargets...); err != nil {
+			return fmt.Errorf("scan row for %s: %w", table, err)
+		}
+
+		literals := make([]string, len(columns))
+		for i, value := range values {
+			literals[i] = toSQLLiteral(value)
+		}
+
+		stmt := fmt.Sprintf(
+			"INSERT INTO %s.%s (%s) VALUES (%s);\n",
+			quoteIdentifier(schema),
+			quoteIdentifier(table),
+			joinIdentifiers(columns),
+			strings.Join(literals, ", "),
+		)
+		if _, err := io.WriteString(w, stmt); err != nil {
+			return err
+		}
+		rowCount++
+	}
+	if err := rows.Err(); err != nil {
+		return err
+	}
+
+	if rowCount == 0 {
+		_, err := io.WriteString(w, "-- no rows\n")
+		return err
+	}
+
+	return nil
+}
+
+func joinIdentifiers(columns []string) string {
+	quoted := make([]string, len(columns))
+	for i, column := range columns {
+		quoted[i] = quoteIdentifier(column)
+	}
+	return strings.Join(quoted, ", ")
+}
+
+func quoteIdentifier(value string) string {
+	return `"` + strings.ReplaceAll(value, `"`, `""`) + `"`
+}
+
+func toSQLLiteral(value any) string {
+	switch v := value.(type) {
+	case nil:
+		return "NULL"
+	case string:
+		return quoteString(v)
+	case []byte:
+		if len(v) == 0 {
+			return quoteString("")
+		}
+		if isPrintableUTF8(v) {
+			return quoteString(string(v))
+		}
+		return quoteString(`\x` + hex.EncodeToString(v))
+	case bool:
+		if v {
+			return "TRUE"
+		}
+		return "FALSE"
+	case int:
+		return fmt.Sprintf("%d", v)
+	case int8:
+		return fmt.Sprintf("%d", v)
+	case int16:
+		return fmt.Sprintf("%d", v)
+	case int32:
+		return fmt.Sprintf("%d", v)
+	case int64:
+		return fmt.Sprintf("%d", v)
+	case uint:
+		return fmt.Sprintf("%d", v)
+	case uint8:
+		return fmt.Sprintf("%d", v)
+	case uint16:
+		return fmt.Sprintf("%d", v)
+	case uint32:
+		return fmt.Sprintf("%d", v)
+	case uint64:
+		return fmt.Sprintf("%d", v)
+	case float32:
+		return fmt.Sprintf("%g", v)
+	case float64:
+		return fmt.Sprintf("%g", v)
+	case time.Time:
+		return quoteString(v.Format(time.RFC3339Nano))
+	default:
+		return quoteString(fmt.Sprint(v))
+	}
+}
+
+func quoteString(value string) string {
+	return "'" + strings.ReplaceAll(value, "'", "''") + "'"
+}
+
+func isPrintableUTF8(data []byte) bool {
+	for _, b := range data {
+		if b == 0 {
+			return false
+		}
+	}
+	return true
+}
diff --git a/config.sample.yaml b/config.sample.yaml
index ea849b3..c607f2f 100644
--- a/config.sample.yaml
+++ b/config.sample.yaml
@@ -1,3 +1,6 @@
+server:
+  port: 8081
+
 database:
   host: localhost #when use docker change to "db"
   port: 5432
diff --git a/controllers/ai.go b/controllers/ai.go
index 7c4d3b9..ed02abc 100644
--- a/controllers/ai.go
+++ b/controllers/ai.go
@@ -256,7 +256,7 @@ func callAIForAnalysis(prompt string) (*aiAnalysisResult, error) {
 			},
 			Temperature:         0.6,
 			TopP:                0.6,
-			MaxCompletionTokens: 4000,
+			MaxCompletionTokens: 8000,
 		},
 	)
 	if err != nil {
@@ -472,7 +472,7 @@ func (tc *TrainingController) streamAIAnalysis(c *gin.Context, prompt string,
 			},
 			Temperature:         0.6,
 			TopP:                0.6,
-			MaxCompletionTokens: 4000,
+			MaxCompletionTokens: 8000,
 			Stream:              true,
 			StreamOptions: &openai.StreamOptions{
 				IncludeUsage: true,
diff --git a/scripts/export_db.ps1 b/scripts/export_db.ps1
new file mode 100644
index 0000000..2472b80
--- /dev/null
+++ b/scripts/export_db.ps1
@@ -0,0 +1,12 @@
+$ErrorActionPreference = "Stop"
+
+$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$projectRoot = Resolve-Path (Join-Path $scriptDir "..")
+
+Push-Location $projectRoot
+try {
+    go run ./cmd/export_sql @args
+}
+finally {
+    Pop-Location
+}