CREATETABLEnew_tableSELECT...FROMold_table ... 如果尝试这么做,该语句会被拒绝,并报错——Can't update table 'old_table' while 'new_table' is being created。在MySQL 5.5以及更早的版本中有所不同。(This is a change in behavior from MySQL 5.5 and earlier, which permitted CREATE TABLE ... S...
Queries data in the specified partition in a partitioned table. partition_name Specifies the name of a partition. partition_value Specifies the value of the specified partition key. If there are many partition keys, use thePARTITION FORclause to specify the value of the only partition key you ...
Count-of-Typeobject_type 1303event 351map 84message 77pred_compare 53動作 46pred_source 28type 17目標 C.3 SELECT 所有可用的項目依類型排序 下列的 SELECT 會傳回約 1915 筆資料列,每列一個物件。 SQL SELECT--C.3o.object_typeAS[Type-of-Item], p.nameAS[Package], o.nameAS[Item], o.descr...
28type 17目标 C.3 使用 SELECT 语句查询所有可用项,按类型排序 以下SELECT 语句返回大约 1915 个行,每一行针对一个对象。 SQL SELECT--C.3o.object_typeAS[Type-of-Item], p.nameAS[Package], o.nameAS[Item], o.descriptionAS[Item-Description]FROMsys.dm_xe_objec...
-- Use CREATE TABLE AS SELECT to import the Hadoop data into a new -- table called ClickStreamPDW CREATE TABLE ClickStreamPDW WITH ( CLUSTERED COLUMNSTORE INDEX, DISTRIBUTION = HASH (user_IP) ) AS SELECT * FROM ClickStreamExt ; 使用CTAS 替换 SQL...
table_reference::=,query_partition_clause::=) query_partition_clause::= Description of the illustration query_partition_clause.gif outer_join_type::= Description of the illustration outer_join_type.gif where_clause::= hierarchical_query_clause::= ...
创建示例表test_table1完成后,会自动生成如下3个分区。 p_cn: ("Beijing", "Shanghai", "Hong Kong") p_usa: ("New York", "San Francisco") p_jp: ("Tokyo") 增加一个分区`p_uk` VALUES IN ("London"),则分区结果如下。 p_cn: ("Beijing", "Shanghai", "Hong Kong") p_usa: ("New ...
allow_partition_column_nullable insert_visible_timeout_ms enable_fold_constant_by_be 只支持全局生效的变量如下。 default_rowset_type default_password_lifetime password_history validate_password_policy 同时,变量设置也支持常量表达式,示例如下。 SET exec_mem_limit = 10 * 1024 * 1024 * 1024; SET forw...
其中,`table_name`为表名,`column_name`为分区列,`part_name`为分区名,`value1`和`value2`为分区的边界值。 2.使用 SELECT 语句创建分区表 创建分区表的另一种方法是使用SELECT 语句。语法如下: ``` SELECT * INTO new_table_name FROM old_table_name WHERE partition_condition; ``` 其中,`new_table...
In addition, you cannot useFOR UPDATEas part of theSELECTin a statement such asCREATE TABLEnew_tableSELECT ... FROMold_table... (If you attempt to do so, the statement is rejected with the errorCan't update table 'old_table' while 'new_table' is being created.) This is a change in...