This clause is especially useful in environments such as data warehouses, where the amount of insert and update operations is small. You can specify data segment compression for the following portions of a heap-organized table:For an entire table (in the physical_properties clause of relational_...
For more information, see Use an ordered clustered columnstore index for large data warehouse tables. INDEX index_name [ NONCLUSTERED ] COLUMNSTORE ( column_name [ ,... n ] ) Applies to: SQL Server 2014 (12.x) and later, and Azure SQL Database. Specifies to create a nonclustered ...
Is the name of the constraint. Constraint names must follow the rules foridentifiers, except that the name cannot start with a number sign (#). If constraint_name is not supplied, a system-generated name is assigned to the constraint. ...
This function is a window function that computes a sequential row number starting with 1.The following code—which is run in the same batch as the script in step 2—inserts rows into the Orders_with_Identifier table. The values for the Row_ID column are computed by adding the @MaxID ...
part表的文件路径为/user/hive/warehouse/partition.db/part_4,region表的文件路径为/user/hive/warehouse/mppdb.db/region_orc11_64stripe/。 创建HDFS_Server,对应的foreign data wrapper为HDFS_FDW或者DFS_FDW。 1 CREATE SERVER hdfs_server FOREIGN DATA WRAPPER HDFS_FDW OPTIONS (address '10.10.0.100:...
SELECT count(*) FROM customer_address PARTITION (P1); SELECT count(*) FROM customer_address PARTITION FOR (2450815); 示例2:使用START END语法创建列存range分区表。 CREATE TABLE customer_address_SE ( ca_address_sk INTEGER NOT NULL , ca_address_id CHARACTER(16) NOT NULL , ca_street_number...
This function is a window function that computes a sequential row number starting with 1.The following code—which is run in the same batch as the script in step 2—inserts rows into the Orders_with_Identifier table. The values for the Row_ID column are computed by adding the @MaxID ...
Analytic and aggregate functions in the recursive part of the CTE are applied to the set for the current recursion level and not to the set for the CTE. Functions likeROW_NUMBERoperate only on the subset of data passed to them by the current recursion level and not the entire set of data...
{CLUSTEREDCOLUMNSTOREINDEX--default for Synapse Analytics|CLUSTEREDCOLUMNSTOREINDEXORDER(column[,...n]) |HEAP--default for Parallel Data Warehouse|CLUSTEREDINDEX( {index_column_name[ASC|DESC] } [ ,...n ] )--default is ASC} |PARTITION(partition_column_nameRANGE[LEFT|RIGHT]--default is LEFT...
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