From ade947f9736c45e4f5b58fbe18248e3b043ed153 Mon Sep 17 00:00:00 2001
From: pointevent <35189924+pointevent@users.noreply.github.com>
Date: Thu, 9 Mar 2023 17:11:51 +0800
Subject: [PATCH] fixed the sql string is went wrongs

Missing 'from' keywork in the 'ExistFieldSql' method of the 'SqlAlias.Extensions.cs' class.
---
 src/Overt.Core.Data/Extensions/SqlAlias.Extensions.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Overt.Core.Data/Extensions/SqlAlias.Extensions.cs b/src/Overt.Core.Data/Extensions/SqlAlias.Extensions.cs
index fe1f6ea..f8cc7c0 100644
--- a/src/Overt.Core.Data/Extensions/SqlAlias.Extensions.cs
+++ b/src/Overt.Core.Data/Extensions/SqlAlias.Extensions.cs
@@ -171,7 +171,7 @@ public static string ExistFieldSql(this DatabaseType dbType, string dbName, stri
             {
                 case DatabaseType.SqlServer:
                 case DatabaseType.GteSqlServer2012:
-                    return $"select count(1) sys.columns where object_id = object_id('{tableName}') and name='{fieldName}'";
+                    return $"select count(1) from sys.columns where object_id = object_id('{tableName}') and name='{fieldName}'";
                 case DatabaseType.MySql:
                     return $"select count(1) from information_schema.columns where table_schema = '{dbName}' and table_name  = '{tableName}' and column_name = '{fieldName}'";
                 case DatabaseType.SQLite: