国外主机测评 - 国外VPS，国外服务器，国外云服务器，测评及优惠码
MSSQL is a relational database management system (RDBMS) developed by microsoft. It is the most widely used RDBMS in enterprises.Many enterprises now use it for their core data platform. The query language used by MSSQL is Transact-SQL (T-SQL). It has powerful functions and can help solve many complex problems when searching for information. Let’s take a look at how to explore the value of searching by MSSQL.
The first step is to connect the MSSQL database. After setting up the environment properly, we can use the command line of MSSQL, the MSSQL Studio or other tool to connect to the MSSQL database. If successful, you can start writing queries.
Secondly,we need to understand the data table structure of the MSSQL database, including the data table names, fields, and the relationships between tables. We can use the system command “sp_help” to query the structure of data tables, so that we can obtain the useful information for writing the corresponding query.
Thirdly, after understanding the data structure, it is necessary to distinguish the type of the data to be searched, such as numerical data, text data, date data, etc. We can use different operators to correspond to different data types in the T-SQL query statement, such as “between” operator for numerical data comparison, and “like” operator for text data comparison.
Finally,we use the “select…from…where” statement to search the data. We can also use subqueries and joins to query complex relationships between data tables. For example, we can use the left outer join to connect two tables and obtain the data we want.
In conclusion, MSSQL search is very powerful and efficient.By combining all the tips mentioned above,we will be able to capture the value of MSSQL search.
Here’s an example query of MSSQL search.
SELECT t.*
FROM table1 t
LEFT OUTER JOIN table2 t2
ON t.table1ID = t2.table2ID
WHERE t.Name like ‘%myName%’
AND t.Age BETWEEN 20 AND 30
