Q I have a SQL Server 2000 SP3 database schema which is a build of Table A with a foreign key to Table B. Because the data in Table B is sensitive, I keep it encrypted, but that's not secure enough for my needs.
Note: It is a best practice to define column aliases with an AS clause whenever possible in a Custom SQL Query. This is because each database has its own rules when it comes to automatically generating a column name whenever an alias is not used. Edit a custom SQL query To edit a cust...
Statistics can be automatically updated.The logic that automatically updates statistics is more aggressive on large tables. In practice, this should reduce cases where customers have seen performance issues on queries where newly inserted rows are queried frequently but where the statistics hadn't been...
Multi-statement: returns a tabular result-set but, unlike inline, multiple SELECT statements can be used inside the function body.9. What is a UNIQUE constraint? A UNIQUE constraint ensures that all values in a column are different. This provides uniqueness for the column(s) and helps identify...
Once you are done with everything, you will have your own SQL server to practice! READ>> 2) How to install SQL Workbench for postgreSQL SQL Workbench is my favorite SQL manager tool. It’s fast, stable and runs on every operating system. SQL Workbench will boost your SQL learning curve...
sp_server_diagnosticsdoesn't perform health checks at the database level. DB_FAILOVER = { ON | OFF } Specifies the response to take when a database on the primary replica is offline. When set to ON, any status other than ONLINE for a database in the availability group triggers an aut...
aws_iam_policies_attached_to_users.sh - finds AWS IAM policies directly attached to users (anti-best practice) instead of groups aws_iam_policies_granting_full_access.sh - finds AWS IAM policies granting full access (anti-best practice) aws_iam_policies_unattached.sh - lists unattached AWS IA...
DDL(Data Definition Language,数据定义语言) CREATE : 创建数据库和表等对象 DROP : 删除数据库和表等对象 ALTER : 修改数据库和表等对象的结构DML(Data Manipulation Language,数据操纵语言) SELECT :查询表中的数据 INSERT :向表中插入新数据 UPDATE :更新表中的数据 DELETE :删除表中的数据DCL...
For example, when you construct a query by using ORDER BY, the sort order of your result set might depend on the collation applied to the database, or dictated in a COLLATE clause at the expression level of the query. To best use collation support in SQL Server, you should understand ...
Remember that we are creating a POC for a retail company–so that means that in general, the schema will typically look like this the following. In practice, the schemas will have slight variations depending on the company. Customersource table: ...