diff --git a/Server/Git/ExcelSQL.cs b/Server/Git/ExcelSQL.cs
index 1d85764..d3bc9eb 100644
--- a/Server/Git/ExcelSQL.cs
+++ b/Server/Git/ExcelSQL.cs
@@ -4,6 +4,7 @@ using Npgsql;
 using Server.SQL;
 using Server.System;
 using System.Globalization;
+using System.Text;
 
 namespace Server.Git
 {
@@ -30,87 +31,86 @@ namespace Server.Git
 
                     // 쿼리 작성 및 실행
                     //모든 쿼리 삭제
-                    string query;
+                    StringBuilder query;
                     string header1 = "CREATE TABLE excel.";
                     string header2 = "INSERT INTO excel.";
-                    string newTableQuery;
-                    string tableDatas;
+                    StringBuilder newTableQuery;
+                    StringBuilder tableDatas = new StringBuilder();
                     #region 모든 테이블 삭제
-                    query = "DROP SCHEMA excel CASCADE;" +
-                        "CREATE SCHEMA excel AUTHORIZATION manager;";
-                    ExecuteNonQuery(connection, query);
+                    ExecuteNonQuery(connection, "DROP SCHEMA excel CASCADE;CREATE SCHEMA excel AUTHORIZATION manager;");
                     #endregion
                     #region 테이블 세팅
-                    query = "";
+                    query = new StringBuilder();
                     for (int n = 0; n < sheets.Count; n++)
                     {
                         //초기화
-                        newTableQuery = "";
-                        tableDatas = "(";
+                        newTableQuery = new StringBuilder();
+                        tableDatas.Append("(");
 
                         #region 신규 테이블 생성
-                        newTableQuery += header1;
-                        newTableQuery += sheets[n].name + "(";
+                        newTableQuery.Append(header1);
+                        newTableQuery.Append(sheets[n].name);
+                        newTableQuery.Append("(");
                         for (int m = 0; m < sheets[n].variable.Count; m++)
                         {
                             if (sheets[n].dataEnum[m] == "client")
                                 continue;
                             if (sheets[n].type[m] == "long" && sheets[n].variable[m] == "index")
                             {
-                                newTableQuery += "index SERIAL PRIMARY KEY";
-                                tableDatas += "index";
+                                newTableQuery.Append("index SERIAL PRIMARY KEY");
+                                tableDatas.Append("index");
                                 continue;
                             }
                             if (m != 0)
                             {
-                                newTableQuery += ",";
-                                tableDatas += ", ";
+                                newTableQuery.Append(",");
+                                tableDatas.Append(", ");
                             }
                          
                             switch (sheets[n].type[m])
                             {
                                 case "bool":
-                                    newTableQuery += $"{sheets[n].variable[m]} BOOL ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} BOOL ");
                                     break;
                                 case "int":
-                                    newTableQuery += $"{sheets[n].variable[m]} INT ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} INT ");
                                     break;
                                 case "long":
-                                    newTableQuery += $"{sheets[n].variable[m]} LONG ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} LONG ");
                                     break;
                                 case "float":
-                                    newTableQuery += $"{sheets[n].variable[m]} FLOAT4 ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} FLOAT4 ");
                                     break;
                                 case "string":
                                 case "json":
-                                    newTableQuery += $"{sheets[n].variable[m]} VARCHAR(255) ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} VARCHAR(255) ");
                                     break;
                                 case "enum":
-                                    newTableQuery += $"{sheets[n].variable[m]} INT2 ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} INT2 ")  ;
                                     break;
                                 case "text":
-                                    newTableQuery += $"{sheets[n].variable[m]} TEXT ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} TEXT ");
                                     break;
                                 case "time":
-                                    newTableQuery += $"{sheets[n].variable[m]} timestamp ";
+                                    newTableQuery.Append($"{sheets[n].variable[m]} timestamp ");
                                     break;
                                 default:
                                     logger.Error($"unknown data {sheets[n].type[m]}");
                                     break;
                             }
-                            tableDatas += sheets[n].variable[m];
+                            tableDatas.Append(sheets[n].variable[m]);
                         }
-                        newTableQuery += ");\n";
-                        tableDatas += ") VALUES ";
+                        newTableQuery.Append(");\n");
+                        tableDatas.Append(") VALUES ");
                         bool isStart = true;
-                        query += newTableQuery;
+                        query.Append(newTableQuery.ToString());
 
                         #endregion
                         #region 신규 테이블 데이터 올리기
 
-                        query += header2;
-                        query += sheets[n].name;
-                        query += tableDatas;
+                        query.Append(header2);
+                        query.Append(sheets[n].name);
+                        query.Append(tableDatas.ToString());
                         foreach(KeyValuePair<long, Dictionary<string, object>> pair in sheets[n].dicViewer)
                         {
                             if (isStart)
@@ -119,16 +119,16 @@ namespace Server.Git
                             }
                             else
                             {
-                                query += ", ";
+                                query.Append(", ");
                             }
-                            query += "(";
+                            query.Append("(");
                             for (int m = 0; m < sheets[n].variable.Count; m++)
                             {
                                 if (sheets[n].dataEnum[m] == "client")
                                     continue;
                                 if (m != 0)
                                 {
-                                    query += ", ";
+                                    query.Append(", ");
                                 }
 
                                 switch (sheets[n].type[m])
@@ -138,27 +138,27 @@ namespace Server.Git
                                     case "int":
                                     case "float":
                                     case "long":
-                                        query += $"{pair.Value[sheets[n].variable[m]]}";
+                                        query.Append($"{pair.Value[sheets[n].variable[m]]}");
                                         break;
                                     case "string":
                                     case "json":
                                     case "text":
-                                        query += $"'{pair.Value[sheets[n].variable[m]]}'";
+                                        query.Append($"'{pair.Value[sheets[n].variable[m]]}'");
                                         break;
                                     case "time":
-                                        query += $"'{((DateTime)pair.Value[sheets[n].variable[m]]).ToString("yyyy-MM-dd HH:mm:ss")}'";
+                                        query.Append($"'{((DateTime)pair.Value[sheets[n].variable[m]]).ToString("yyyy-MM-dd HH:mm:ss")}'");
                                         break;
                                     default:
                                         logger.Error($"unknown data value {sheets[n].type[m]}");
                                         break;
                                 }
                             }
-                            query += ")";
+                            query.Append(")");
                         }
-                        query += ";";
+                        query.Append(";");
                         #endregion
                     }
-                    ExecuteNonQuery(connection, query);
+                    ExecuteNonQuery(connection, query.ToString());
 
                     #endregion
                 }