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User-Defined Functions,tions (UDFs). Like functions in other programming languages, T-SQL UDFs offer a convenient way for developers to define procedural routines that accept parameters, perform actions based on those parameters, and return data to the caller. T-SQL functions come in three flavors: inline table-valued fun控制 发表于 2025-3-22 10:58:10
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T-SQL Encryption, encryption functionality for data. In order to encrypt sensitive data, database administrators and developers had to turn to third-party tools or write their own extended procedures. Even with these tools in place various aspects of the system, such as encryption key management, left many databases爱哭 发表于 2025-3-22 17:09:09
Error Handling and Debugging,ilable but also adds structured error handling similar to that offered by other high-level languages such as C++, C#, and VB. This chapter discusses legacy T-SQL error handling functionality and the new structured error handling model in T-SQL. This chapter also introduces tools useful for debuggingcanonical 发表于 2025-3-23 00:19:04
Dynamic SQL, as strings in your server-side applications and executing them dynamically (“on the fly”). When used properly, dynamic SQL can be used to generate complex queries at run time, in some cases improve performance, and do tasks that just aren’t doable (or are extremely difficult) in nondynamic T-SQL. TCRP743 发表于 2025-3-23 04:30:57
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SQL Metadata,io that need to retrieve metadata for many different types of database objects. Under the hood, applications that rely on SQL Bulk Load APIs, such as the bcp (bulk-copy program) utility, have to address database columns by their ordinal position. Robust applications can use SQL metadata to automatic