BEGIN SCTX := WM_CONCAT_IMPL(NULL) ; RETURNODCICONST.SUCCESS; END; MEMBERFUNCTIONODCIAGGREGATEITERATE(SELFINOUTWM_CONCAT_IMPL, P1INVARCHAR2) RETURNNUMBER IS BEGIN IF(CURR_STRISNOTNULL)THEN CURR_STR := CURR_STR || ',' || P1; ELSE CURR_STR := P1; ENDIF; RETURNODCICONST.SUCCESS; END;...
適用於:SQL Server Azure SQL 資料庫 Azure SQL 受控執行個體 Azure Synapse Analytics Analytics Platform System (PDW) Microsoft Fabric 的 SQL 端點分析 Microsoft Fabric 的倉儲 此函式會傳回透過以端對端方式串連 (或聯結) 兩個以上字串值所產生的字串。 注意 若要在串連期間新增分隔值,請使用 CONCAT_WS...
1.1 将字符的数字转成数字,比如'0'转成0可以直接用加法来实现 例如:将test表中的 t 进行排序,可t的定义为varchar,可以这样解决 select * from test order by (t+0) 1.2在进行ifnull处理时,比如 ifnull(a/b,'0') 这样就会导致 a/b成了字符串,因此需要把'0'改成0,即可解决此困扰 1.3 比较数字和varc...
GROUP_CONCAT([DISTINCT] column_name [ORDER BY 序字段 ASC/DESC] [SEPARATOR '分隔符']) 注:测试时发现,排序似乎不起作用 实践 构造数据: CREATE TABLE tb_test( order_id INT, goods_id INT, user_name VARCHAR(7) ); INSERT INTO tb_test VALUES(1000000001, 1, '授客'), (1000000001, 2, '授客...
s_id HAVING GROUP_CONCAT(IFNULL(t_name,'abc')) not like "%张三%"; 练手题 查询学过编号为“01”并且也学过编号为“02”的课程的同学的信息; select stu.* from stu join sc on stu.s_id=sc.s_id group by stu.s_id having group_concat(c_id) like '%01,02%'; 查询仅学过编号为“...
SCTX// := WM_CONCAT_IMPL(NULL) ; RETURN ODCICONST.SUCCESS; END; MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT WM_CONCAT_IMPL,P1// IN VARCHAR2) RETURN NUMBER IS BEGIN IF(CURR_STR// IS NOT NULL) THEN CURR_STR// := CURR_STR// || ',' || P1//; ...
DROP TABLE IF EXISTS `lgs_operation_task_rules`; CREATE TABLE `lgs_operation_task_rules` ( `ID` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', `site_id` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '站点id', ...
Index.html does not display the page when opened outside VScode I am very new to web development, so, if the questioned is very stupid, guide me appropriately and i will delete the page. I am trying to create a map with d3.js and show the name on the region as too... ...
If SET CONCAT_NULL_YIELDS_NULL is not specified, the setting of the CONCAT_NULL_YIELDS_NULL database option applies.Bilješka SET CONCAT_NULL_YIELDS_NULL is the same setting as the CONCAT_NULL_YIELDS_NULL setting of ALTER DATABASE.
RETURNNUMBERISBEGINRETURNVALUE:=CURR_STR;RETURNODCICONST.SUCCESS;END;MEMBERFUNCTIONODCIAGGREGATEMERGE(SELFINOUTWM_CONCAT_IMPL_CLOB_NULL_LHR,SCTX2INWM_CONCAT_IMPL_CLOB_NULL_LHR)RETURNNUMBERISBEGINIF(SCTX2.CURR_STRISNOTNULL)THENSELF.CURR_STR:=SELF.CURR_STR||SCTX2.CURR_STR;ENDIF;RETURNODCICONST....