# 一列一列处理:把“列名”做为新列的value(如本题的store),把原来的value也作为新列(如本题的price),这是一个查询,其他列不要# 用union all拼接每一列的结果# 本题如果这一产品在商店里没有出售,则不输出这一行,所以要原列 is not null的筛选条件select product_id, 'store1' as store, store1 as...
The SET options in the required value column are required whenever any of the following conditions occur: You create a filtered index. An INSERT, UPDATE, DELETE, or MERGE operation modifies the data in a filtered index. The query optimizer uses the filtered index to produce the query plan....
Write a SQL query to rank scores. If there is a tie between two scores, both should have the same ranking. Note that after a tie, the next ranking number should be the next consecutive integer value. In other words, there should be no "holes" between ranks. For example, given the ab...
在使用 incolumn 參數指定的值中,已對加權內容指定錯誤資料類型的值。 使用者回應 指定有效的參數字串,重新呼叫常式。 sqlcode:-20560 sqlstate:22548SQL20561N 因為表格發生問題,無法執行分析作業。 常式名稱:routine-name。 表格名稱:table-name。 分析訊息 ID:message-ID。 診斷詳細資料:runtime-details。 說明...
ColumnDescription Collisions This value is incremented each time a thread is blocked from accessing a resource protected by a spinlock. Spins This value is incremented for each time a thread executes a loop while waiting for a spinlock to become available. This is a measure of the amount of wo...
column-nameNULLS LAST ASCDESC partition-element: PARTITIONintegerENDINGAT(,constantMAXVALUEMINVALUE)partition-hash-space1INCLUSIVE Notes: 1 Hash-organized tables are deprecated. Beginning in Db2 12, packages bound with APPLCOMPAT( V12R1M504) or higher cannot create hash-organized tables or alter...
information about the type of databases that an availability group can support, seePrerequisites, Restrictions, and Recommendations for Always On Availability Groups (SQL Server). To find out which local databases already belong to an availability group, see thereplica_idcolumn in thesys.databases...
Avoid Transformed Columns in the WHERE Clause Use untransformed column values. For example, use: WHERE a.order_no = b.order_no rather than: WHERE TO_NUMBER (SUBSTR(a.order_no, INSTR(b.order_no, '.') - 1))= TO_NUMBER (SUBSTR(a.order_no, INSTR(b.order_no, '.') - 1)) ...
Specifies your priority for performing backups on this replica relative to the other replicas in the same availability group. The value is an integer in the range of 0..100. These values have the following meanings: 1..100 indicates that the availability replica could be chosen for performing...
Readingtableinformationforcompletionoftableandcolumnnames You can turn off this featuretogeta quicker startupwith-A Database changed 发现目标端是存在sbtest这个库,但是只能小写访问,继续检查大小写敏感配置 mysql>select@@lower_case_table_names; +---+ |@@lower_case_table_names| +---...