SQL Functions: What is It and Exploring Its Various Types How to Run Function in SQL? Replace in SQL: Usage and Implementation of REPLACE() Function ALTER TABLE Statement in SQL – ADD, DROP, MODIFY, RENAME Coalesce in SQL: How to Use Coalesce() Function Index in SQL: Creating, Removing...
EXECUTEsp_addextendedproperty N'MS_Description','部门名称', N'user', N'dbo', N'table', N'StaffList', N'column', N'StaffDepartmnet' EXECUTEsp_addextendedproperty N'MS_Description','职位名称', N'user', N'dbo', N'table', N'StaffList', N'column', N'StaffPositionName' EXECUTEsp_addext...
string query = "SELECT * FROM TableName WHERE ColumnName IN (@Values)"; using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); SqlCommand command = new SqlCommand(query, connection); // 可变数量的参数值 List<int> parameterValues = new List<int> { 1, 2...
行转列 id in效率高 unnest | StarRocks https://docs.starrocks.io/zh/docs/sql-reference/sql-functions/array-functions/unnest/ UNNEST 是一种表函数 (table function),用于将一个数组展开成多行。 您可以将 StarRocks 的 Lateral Join 与 UNNEST 功能结合使用,实现常见的列转行逻辑,比如展开 STRING,ARRAY,...
vector_search(index, query, num_results) Query a Mosaic AI Vector Search index using SQL. Read functions Expand table FunctionDescription read_files(path, [optionKey => optionValue] [, …]) Reads data files on cloud storage and returns it in tabular format. read_kafka([optionKey ...
NameUsed by Visual Studio to reference the name that the function will use when registered in SQL Server. This is not required.A string containing the name of the function. FillRowMethodNameThe name of a method in the same class that fills a row in the table returned by the function.A ...
错误Can’t update table ‘’ in stored function/trigger because it is already used by statement 产生原因 - 原因一: 触发器中使用了insert语句 示例表结构 定义一个插入触发器,new代表插入进来的值,new.sex则说明插进来的sex 插入触发器定义成功 执行插入语句... ...
44. lower_case_table_names 1: MySQL总使用小写字母进行SQL操作; 0: 关闭该功能。 注意:如果使用该参数,则应该在启用前将所有数据表转换为小写字母。 45. max_allowed_packet 一个查询语句包的最大尺寸。消息缓冲区被初始化为net_buffer_length字节,但是可在需要时增加到max_allowed_packet个字节。该值太小则...
1use[MyTest]2create tableTest1([id]int,[name]varchar(20))3create tableTest2([id]int,[name]varchar(20),[address]varchar(100)) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 1declare @RowC int2declare @Namevarchar(20)3set @RowC=04while@RowC<4000005Begin6set @Name='TestName'+CAST...
sql 里面 in 的用法 在 SQL 中,IN 是一个条件运算符,用于筛选满足多个条件中 的任意一个条件的记录。 其语法如下: ``` SELECT column_name(s) FROM table_name WHERE column_name IN (value1, value2, ...); ``` 示例: ``` SELECT * FROM customers WHERE city IN ('New York', 'Los Angeles...