var userSuppliedAuthor = new SqlParameter("@author", "Adi"); context.Database.SqlQuery(typeof(Post), "SELECT * FROM dbo.Posts WHERE Author = @author", userSuppliedAuthor); } 这里的SQL语句将查询Posts表,所以用到了typeof(Post)。如果JOIN语句来查询不同的两张表的话,就需要写一个内部类来返回...
typeof 函数 窗口函数 基于数据窗口的聚合或排序。 聚合函数 dense_rank 函数 lag 函数 IP函数 处理IP 地址的解析与计算。 ip_to_city 函数 ip_prefix 函数 ipv6_to_city 函数 URL函数 解析URL 结构。 url_encode 函数 url_decode 函数 url_extract_fragment 函数 url_extract_path 函数 url_extract_query ...
type>SELECTtypeof(coalesce(ARRAY(1Y),ARRAY(1L)))ARRAY<BIGINT>-- The least common type of INT and FLOAT is DOUBLE>SELECTtypeof(coalesce(1,1F))DOUBLE>SELECTtypeof(coalesce(1L,1F))DOUBLE>SELECTtypeof(coalesce(1BD,1F))DOUBLE-- The least common type between an INT and STRING is BIGIN...
var props = typeof(MaterialModel).GetProperties().Select(x => x.Name).ToArray(); //组装插入sql(获取到模型属性作为字段名称且带双引号的数组) string cols = EntityHelper.Join(",","\"",props); 1. 2. 3. 4. 5. 方法二:重新创建该表,去除字段上的双引号 也可以使用其他编辑工具替换掉sql语句...
id",typeof(string));table.Columns.Add("object_xpath",typeof(string));table.Columns.Add("...
> SELECT typeof(coalesce(1, DATE'2020-01-01')); Error: DATATYPE_MISMATCH.DATA_DIFF_TYPES -- Both are ARRAYs and the elements have a least common type > SELECT typeof(coalesce(ARRAY(1Y), ARRAY(1L))) ARRAY<BIGINT> -- The least common type of INT and FLOAT is DOUBLE > SELECT typ...
type>SELECTtypeof(coalesce(ARRAY(1Y),ARRAY(1L)))ARRAY<BIGINT>-- The least common type of INT and FLOAT is DOUBLE>SELECTtypeof(coalesce(1,1F))DOUBLE>SELECTtypeof(coalesce(1L,1F))DOUBLE>SELECTtypeof(coalesce(1BD,1F))DOUBLE-- The least common type between an INT and STRING is BIGINT>...
SqlDbType.Int: return typeof(Int32); case SqlDbType.Money: return typeof(Decimal); case SqlDbType.NChar: return typeof(String); case SqlDbType.NText: return typeof(String); case SqlDbType.NVarChar: return typeof(String); case SqlDbType.Real: return typeof(Single); case SqlDbType....
(value as type); try_cast(value as type) : 转换失败返回null typeof(expr) :返回数据类型 数学运算 + - * / % abs() 绝对值 ceil() 向上取整 floor() 向下取整 pow(x,p);power(x,p) x^p rand();random() 返回[0,1)间随机数 round(): 同int() round(x,d):保留基本d位小数 nan():...
("a",typeof(int)); for(inti=0;i<100000;i++) t.Rows.Add(1); // pre-create the table with "CREATE TABLE t (a sql_Variant)" in a datab...