


How to Pass a List of Strings to a SQL Server Stored Procedure Using a User-Defined Table Type?
Passing a list of strings to a SQL Server stored procedure using a user-defined table type
When calling a SQL Server stored procedure from C#, you may need to pass a list of strings as parameters. While standard parameters are sufficient for handling simple data types, for complex data structures such as lists, a more sophisticated approach is required.
To pass a list of strings, we can leverage the User-Defined Table Type (UDTT) feature of SQL Server. This feature allows us to create a custom data type that simulates a table to store a collection of data.
Create user-defined table type
First, we need to create a User-Defined Table Type (UDTT):
CREATE TYPE [dbo].[StringList] AS TABLE( [Item] [NVARCHAR](MAX) NULL );
This UDTT defines a single column named "Item" to hold strings.
Modify stored procedure
Next, we modify the stored procedure to accept UDTT parameters:
CREATE PROCEDURE [dbo].[sp_UseStringList] @list StringList READONLY AS BEGIN -- 只返回我们传入的项目 SELECT l.Item FROM @list l; END
Populating UDTT in C#
In C# we use DataTable to populate UDTT:
using (var table = new DataTable()) { table.Columns.Add("Item", typeof(string)); // ...此处添加循环填充字符串列表到DataTable的代码... SqlParameter pList = new SqlParameter("@list", SqlDbType.Structured); pList.Value = table; }
Pass UDTT parameters to stored procedures
Finally, we pass the UDTT parameters to the stored procedure:
using (var cmd = new SqlCommand("exec sp_UseStringList @list", con)) { cmd.Parameters.Add(pList); using (var dr = cmd.ExecuteReader()) { while (dr.Read()) Console.WriteLine(dr["Item"].ToString()); } }
This approach allows us to efficiently pass a list of strings to a SQL Server stored procedure.
The above is the detailed content of How to Pass a List of Strings to a SQL Server Stored Procedure Using a User-Defined Table Type?. For more information, please follow other related articles on the PHP Chinese website!

Stored procedures are precompiled SQL statements in MySQL for improving performance and simplifying complex operations. 1. Improve performance: After the first compilation, subsequent calls do not need to be recompiled. 2. Improve security: Restrict data table access through permission control. 3. Simplify complex operations: combine multiple SQL statements to simplify application layer logic.

The working principle of MySQL query cache is to store the results of SELECT query, and when the same query is executed again, the cached results are directly returned. 1) Query cache improves database reading performance and finds cached results through hash values. 2) Simple configuration, set query_cache_type and query_cache_size in MySQL configuration file. 3) Use the SQL_NO_CACHE keyword to disable the cache of specific queries. 4) In high-frequency update environments, query cache may cause performance bottlenecks and needs to be optimized for use through monitoring and adjustment of parameters.

The reasons why MySQL is widely used in various projects include: 1. High performance and scalability, supporting multiple storage engines; 2. Easy to use and maintain, simple configuration and rich tools; 3. Rich ecosystem, attracting a large number of community and third-party tool support; 4. Cross-platform support, suitable for multiple operating systems.

The steps for upgrading MySQL database include: 1. Backup the database, 2. Stop the current MySQL service, 3. Install the new version of MySQL, 4. Start the new version of MySQL service, 5. Recover the database. Compatibility issues are required during the upgrade process, and advanced tools such as PerconaToolkit can be used for testing and optimization.

MySQL backup policies include logical backup, physical backup, incremental backup, replication-based backup, and cloud backup. 1. Logical backup uses mysqldump to export database structure and data, which is suitable for small databases and version migrations. 2. Physical backups are fast and comprehensive by copying data files, but require database consistency. 3. Incremental backup uses binary logging to record changes, which is suitable for large databases. 4. Replication-based backup reduces the impact on the production system by backing up from the server. 5. Cloud backups such as AmazonRDS provide automation solutions, but costs and control need to be considered. When selecting a policy, database size, downtime tolerance, recovery time, and recovery point goals should be considered.

MySQLclusteringenhancesdatabaserobustnessandscalabilitybydistributingdataacrossmultiplenodes.ItusestheNDBenginefordatareplicationandfaulttolerance,ensuringhighavailability.Setupinvolvesconfiguringmanagement,data,andSQLnodes,withcarefulmonitoringandpe

Optimizing database schema design in MySQL can improve performance through the following steps: 1. Index optimization: Create indexes on common query columns, balancing the overhead of query and inserting updates. 2. Table structure optimization: Reduce data redundancy through normalization or anti-normalization and improve access efficiency. 3. Data type selection: Use appropriate data types, such as INT instead of VARCHAR, to reduce storage space. 4. Partitioning and sub-table: For large data volumes, use partitioning and sub-table to disperse data to improve query and maintenance efficiency.

TooptimizeMySQLperformance,followthesesteps:1)Implementproperindexingtospeedupqueries,2)UseEXPLAINtoanalyzeandoptimizequeryperformance,3)Adjustserverconfigurationsettingslikeinnodb_buffer_pool_sizeandmax_connections,4)Usepartitioningforlargetablestoi


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 English version
Recommended: Win version, supports code prompts!

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
