Update tables_sqlServer.sql (#787)
Update tables_sqlServer.sql (#787)

Usage of deprecated views:
 - dbo.sysobjects is deprecated since SQL Server 2008 and newer view added in SQL Server 2005 such as sys.objects, sys.tables or sys.foreign_keys should be used (see reference)
 - All If EXISTS line now use either syntax
    * If EXISTS(…) queries have been replaced when only object_id is being used by a simpler syntax using OBJECT_ID(N’name’, N’type’) IS NOT NULL
    * When other columns are need, view in sys schema are used (sys.foreign_keys)
 - Note that using function such as OBJECT_ID() simplify and shorten the queries but it may require temporary lock  on system tables while reading them

Datatypes:
 - They have been converted to lower case (UPPERCASE is used only for Transact-SQL keywords, see references)
 - Brackets have been remove
 - They have been standardise (integer => int)

Semicolon:
 - Add semicolon (Transact-SQL statement terminator). Although the semicolon is not required for most statements in this version of SQL Server, it will be required in a future version. (see references)

Missing brackets:
 - Missing brackets around some object names have been added in order to standardise the whole script

References:
 - Transact-SQL Syntax Conventions = https://docs.microsoft.com/en-us/sql/t-sql/language-elements/transact-sql-syntax-conventions-transact-sql?view=sql-server-2017
 - sys.sysobjects = https://docs.microsoft.com/en-us/sql/relational-databases/system-compatibility-views/sys-sysobjects-transact-sql
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