Here's what I have for if all the projects have a user assign: SELECT p.name, CONCAT(u.lastName, ', ', u.firstName) AS user, p.dueDate FROM projects p, users u WHERE p.uid = u.id ORDER BY p.id DESC; This results in no results when the p.uid is NULL, and I need it ...
IFNULL(CONCAT_WS(', ', IF(current_country = 'Unknown' OR current_country = 'Not Applicable', NULL, current_country), IF(current_locality = 'Unknown' OR current_locality = 'Not Applicable', NULL, current_locality), IF(current_place = 'Unknown' OR current_place = 'Not Applicable', NUL...
This function returns a string result with the concatenated non-NULL values from a group. It returns NULL if there are no non-NULL values. The full syntax is as follows: WEBJ2EE 2021/09/24 2K0 玩转mysql函授:concat以及group_concat 编程算法 返回结果为连接参数产生的字符串,如果有任何一个参数...
INSERT INTO `lgs_operation_task_rules` VALUES (1, NULL, 1, '定时重启123456', 7, 7, 13, '6', '系统默认,不可修改!放屁', 'true', 0, 0, NULL, '2022-08-19 00:00:00', NULL, '2022-08-19 00:00:00'); INSERT INTO `lgs_operation_task_rules` VALUES (2, NULL, 1, '年度drp'...
for (int ctr = values.GetLowerBound(0); ctr <= (int) Math.Ceiling(Math.Sqrt(values.GetUpperBound(0))); ctr++) { if ((int) values.GetValue(ctr) == 1) continue; for (int multiplier = ctr; multiplier <= maxPrime / 2; multiplier++) if (ctr * multiplier <= maxPrime) values.Set...
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....
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....
好像是用过的 这个报错:Invalid function GROUP_CONCAT 可能是版本问题:当前hive版本:hive-common-2.1.1-cdh6.2.0 apache-hive-1.2.1-也没有这个函数 1.2.2也没有 我记错了,吧 1. 2. 3. 4. 5. 6. 其他 CONCAT(‘My’, NULL, ‘QL’)
The behavior reported is according to the documentation for CONCAT_WS():http://dev.mysql.com/doc/refman/5.0/en/string-functions.htmlWhich says: If the separator is NULL, the result is NULL. and CONCAT_WS() does not skip empty strings. However, it does skip any NULL values after the se...
If, instead of using SUBSTR, you use TRIM and the first non-NULL value has the delimiter character as the first character(s) in the string then you will remove too many characters and the final row of the sample data would output NULL. Instead, it is better to remove only the number ...