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CASE N WHEN 1 THEN SELECT "One" WHEN 2 WHEN 3 THEN SELECT "Two or Three" ELSE SELECT "The number is outside range" CASE END; This gives a SQL syntax error. Thanks -- Jeff in Seattle Subject Written By Posted CASE with multiple consecutive WHEN(s) ...
使用foreachENcase when then 的基本用法 SELECT CASE WHEN b.is_leave = 0 THEN '在职' WHEN b...
分析： 1，变量控制 这个很简单，在线程执行进入的时候，写控制变量running = true。线程将要退出的时候...
No fallthrough. The closest you will get is... SET @n=3; SELECT CASE WHEN @n=1 THEN "One" WHEN @n=2 OR @n=3 THEN "Two or Three" ELSE "N is out of range" END; PB http://www.artfulsoftware.comNavigate: Previous Message• Next Message Options: Reply• Quote ...
The string forAES_ENCRYPT()to encrypt using the key stringkey_str, or (as of MySQL 5.7.40) the key derived from it by the specified KDF. The string can be any length. Padding is automatically added tostrso it is a multiple of a block as required by block-based algorithms such as ...
Original task description === We shall allow one to request multiple of locks Via serie of GET_LOCK statements, it would be even nice to allow several locks in single function call: GET_LOCK("lock1","lock2",0); GET_LOCK("lock3",0) Implementing this option one shall take care of po...
• The optimizer makes no attempt to merge windows that could be evaluated in a single step (for example, when multiple OVER clauses contain identical window definitions). The workaround is to define the window in a WINDOW clause and refer to the window name in the OVER clauses. ...
setup_range_conditions tree = get_mm_tree(¶m, cond); 2. Fix the selectivity for SEL_ARGs by histogram fix_sel_tree_selectivity(¶m, tree); 3. Try to construct a QUICK_GROUP_MIN_MAX_SELECT group_trp = get_best_group_min_max(¶m, tree, &best_cost); 4. Try to construn...
When you build a service cluster, using ECS instances across multiple zones reduces the risk of business downtime and provides resiliency to single-zone failures, enhancing the stability of business systems. Proxy node: responsible for handling client requests and forwarding them to appropriate databa...