[多选] Which two statements are true about Shared SQL Area and Private SQL Areas（）

Which two statements are true about constraints? （） The UNIQUE constraint does not permit a null value for the column.。 A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.。 The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.。 The NOT NULL constraint ensures that null values are not permitted for the column.。 日本经营学家认为在现代市场中，永远存在市场的盲点。这一理论被称为（）。 经济进化论。 不完全*市场理论。 规模经济理论。 市场缝隙理论。 国家电网公司对风电场电压控制的要求是什么？ 个人空间 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for a financial services company. Replication is configured between two SQL Server 2005 computers， and the servers are respectively named SQL1 and SQL2. Real-time transactional data is stored by the SQL1. And SQL2 is utilized for reporting. The data on SQL01 should not be changed by SQL2. The publication contains a large amount of data. Since you are the database administrator， you need to make sure that data is replicated from SQL1 to SQL2 in as near real-time as possible to confirm accurate reporting during replication. In addition， you need to make sure that this data is replicated securely.  Which action should be performed？（） Snapshot replication should be set on SQL1. And then SQL2 should be set as a standard subscriber for a standard subscription.。 Transactional replication should be set on SQL1. And then， SQL2 should be set as a standard subscriber for a standard subscription.。 Merge replication should be set on SQL1. And then SQL2 should be set as a standard subscriber for an updateable subscription.。 Transactional replication should be set on SQL1. And then， SQL2 should be set as a standard subscriber for an updateable subscription.。 Which two statements are true about Shared SQL Area and Private SQL Areas（）