Code optimization

Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -409,7 +409,7 @@ namespace SqlSugar
                     var whereIndex = QueryBuilder.WhereIndex;
                     string parameterName = this.SqlBuilder.SqlParameterKeyWord + "InPara" + whereIndex;
                     this.AddParameters(new SugarParameter(parameterName, inValues[0]));
-                    this.Where(string.Format(QueryBuilder.InTemplate, filed, parameterName));
+                    this.Where(string.Format(QueryBuilder.EqualTemplate, filed, parameterName));
                     QueryBuilder.WhereIndex++;
                 }
                 else

Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs

@@ -207,6 +207,13 @@ namespace SqlSugar
                 return "{0} IN ({1}) ";
             }
         }
+        public virtual string EqualTemplate
+        {
+            get
+            {
+                return "{0} = {1} ";
+            }
+        }
         #endregion
 
         #region Common Methods