字段支持json、jsonb的数据类型,一般使用jsonb。 表字段中有json的字段,数据源的url,要加上?stringtype=unspecified 存储json数据时,入参可以使用Object/Map接受json数据,接受到后,再用fastjson转成json数据,与数据库映射的实体类,json字段就使用String去接受json数据就行,然后就当做正常数据插入到数据库中就行了 //...
4. 解析结果 // 遍历结果集while(resultSet.next()){// 获取json字段数据StringjsonData=resultSet.getString("json_column");// 处理json数据// 例如,将json数据转换为Java对象// 使用第三方库,如JacksonObjectMappermapper=newObjectMapper();JsonNodejsonNode=mapper.readTree(jsonData);// 获取特定字段的值Str...
; bad SQL grammar []; nested exception is org.postgresql.util.PSQLException: ERROR: column "destination" is of type json but expression is of type character varying 建议:You will need to rewrite or cast the expression. 解决方法:可以再jdbc连接后面增加stringtype=unspecified来把JSON类型当STRING类型...
[JsonConverter(typeof(LongArryToStringConverter))] [SugarColumn(ColumnName = "users",ColumnDataType = "bigint []", ColumnDescription = "用户集合", IsArray = true)] public long[] Users { get; set; } = []; var tt= Id <= 0 ? "系统管理员" : DBCore.Db.Queryable<SysRoleDto>().W...
"json" json, "key_to_del"TEXT)RETURNSjson LANGUAGE sql IMMUTABLE STRICTAS$function$SELECTCASEWHEN("json"->"key_to_del")ISNULLTHEN"json"ELSE(SELECTconcat('{', string_agg(to_json("key")||':'||"value",','),'}')FROM(SELECT*FROMjson_each("json")WHERE"key"<>"key_to_del" ...
这两个查询都会将json_column字段中的JSON数据转换为字符串,并将结果列命名为json_string。 执行SQL查询并验证结果: 在PostgreSQL客户端或任何SQL查询工具中执行上述查询,并验证结果是否符合预期。 此外,如果你需要将一个不是JSON格式的数据转换为JSON字符串,然后再转换为文本,你可以使用to_json或json_build_object函数...
iii) If JV is longer than the length or maximum length of TT, then anexception condition is raised: data exception — string data, righttruncation (22001). """ Oracle also behaves accordingly: SQL> select json_serialize('{"a":1, "a":2}' returning varchar2(20)) fromdual; ...
> some string that when parsed back in gives you an equivalent JSON value > as the input. That doesn't seem compatible with truncating the output. Maybe you should take this up with the SQL committee? If you don't like our current behavior, then either you have to say that RETURNING ...
SELECT STRING_AGG(tag, ',') FROM product_tags WHERE product_id = 1; 复制代码JSON_AGG/JSONB_AGG:将多行数据聚合成一个JSON对象或JSONB对象。可以用于将满足特定条件的多行数据转换成JSON格式,方便在应用程序中处理。SELECT JSON_AGG(row_to_json(t)) FROM (SELECT * FROM orders WHERE user_id = ...
private Json dataset; } 和存储库 @Repository public interface AssetRelatedContentRepository extends ReactiveCrudRepository<FnResult, BigInteger> { @Query("SELECT * FROM public.fn_get_relatedcontent(:assetId,:fieldName)") Flux<AssetRelatedContent> findAssetRelatedContent(Integer assetId,String fieldName)...