json_value可以选取其他的json数据作为当前sql的某个字段的value值,json_query可以从其他的json数据查询一个或者多个values(通常是jsonObject或jsonArray)作为当前sql的某个json字段的json数据字符串,json_table可以将json数据作为一个虚拟表 例如: ---查询json_exists检查 select t1.json_data.Name from c_json_t t...
SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Extracts a scalar value from a JSON string. To extract an object or an array from a JSON string instead of a scalar value, seeJSON_QUERY (Transact-SQL). For info about the differences...
以下是在SQL Server 2016中使用JSON_VALUE访问JSON数组的示例: 假设我们有一个名为"students"的JSON数组,其中包含多个学生对象。每个学生对象都有"姓名"和"年龄"两个键。 代码语言:txt 复制 DECLARE @jsonArray NVARCHAR(MAX) SET @jsonArray = '[{"姓名":"张三","年龄":20},{"姓名":"李四","年龄"...
OptionsBuilder<TestDbContext>() .UseLoggerFactory(loggerFactory) .UseSqlServer("server=.;database=Test;Integrated Security=True"); var db = new TestDbContext(optionsBuilder.Options); var names = db.TestEntities.AsNoTracking().Select(t => DbFunctions.JsonValue(t.Extra, "$.Name")).ToArray()...
Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed Instance Azure Synapse AnalyticsExtracts a scalar value from a JSON string.To extract an object or an array from a JSON string instead of a scalar value, see JSON_QUERY (Transact-SQL). For info about the...
OptionsBuilder<TestDbContext>() .UseLoggerFactory(loggerFactory) .UseSqlServer("server=.;database=Test;Integrated Security=True"); var db = new TestDbContext(optionsBuilder.Options); var names = db.TestEntities.AsNoTracking().Select(t => DbFunctions.JsonValue(t.Extra, "$.Name")).ToArray()...
2016-04-18 12:03 −在openjson 里面,其实是可以把数据类型array里面的值遍历出来的,举个栗子 declare @v nvarchar(500) = N' {"name":"test", "obj":{"arr":[1,"ofao",3,4,5]} } ' select * from openjson(@v... 神崎橙 0
.UseSqlServer("server=.;database=Test;Integrated Security=True");var db = new TestDbContext(optionsBuilder.Options);var names = db.TestEntities.AsNoTracking().Select(t => DbFunctions.JsonValue(t.Extra, "$.Name")).ToArray(); 监控生成的Sql语句 ...
1当sql只使用一个json_value函数时,查询结果始终正确: select ID, json_value(json_field, '$.Code') from json_table where ID=390; select ID, json_value(json_field, '$.Time') from json_table where ID=390; 两条语句均只返回一条记录。
Builder=newDbContextOptionsBuilder<TestDbContext>().UseLoggerFactory(loggerFactory).UseSqlServer("server=.;database=Test;Integrated Security=True");vardb=newTestDbContext(optionsBuilder.Options);varnames=db.TestEntities.AsNoTracking().Select(t=>DbFunctions.JsonValue(t.Extra,"$.Name")).ToArray();...