If you want to use the same style but make it work, you need to add your own index/row co...
Using a different type of FOR loop, you can iterate through the results of a query and manipulate that data accordingly. The syntax is: [ <<label>> ]FORtargetINqueryLOOPstatementsENDLOOP[label]; 3.5 Looping Through Arrays The FOREACH loop iterates through the elements of an array value. Th...
offset := offset + batch_size; END LOOP; END $$; (2) 使用并行写入 -- 启用 GaussDB 的并行插入功能(需配置参数) SET max_parallel_workers_per_gather =4; -- 并行插入多条记录 INSERT INTO large_table (data) SELECT generate_series(1,1000000) AS id; 3. 数据完整性保障 (1) 事...
declare type row_num_type is table of number index by simple_integer; type row_text_type is table of varchar2(10) index by simple_integer; row_num_tab row_num_type; row_text_tab row_text_type; v_total number;begin for i in 1..10 loop row_num_tab(i) := i; row_text_tab(i)...
SELECT UPDATE MERGE Transact-SQL 語法慣例 語法 syntaxsql 複製 <query_hint> ::= { { HASH | ORDER } GROUP | { CONCAT | HASH | MERGE } UNION | { LOOP | MERGE | HASH } JOIN | DISABLE_OPTIMIZED_PLAN_FORCING | EXPAND VIEWS | FAST <integer_value> | FORCE ORDER | { FORCE | DISABLE...
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Specifies that all join operations are performed by LOOP JOIN, MERGE JOIN, or HASH JOIN in the whole query. If you specify more than one join hint, the optimizer selects the least expensive join strategy from the allowed ones. If you specify a join hint in the same query's ...
Use the Collection page of the Foreach Loop Editor dialog box to specify the enumerator type and configure the enumerator. To learn about the Foreach Loop container and how to configure it, see Foreach Loop Container and Configure a Foreach Loop Container. Static Options Enumerator Select the ...
Use the Collection page of the Foreach Loop Editor dialog box to specify the enumerator type and configure the enumerator. To learn about the Foreach Loop container and how to configure it, see Foreach Loop Container and Configure a Foreach Loop Container. Static Options Enumerator Select the ...
Specifies that all join operations are performed by LOOP JOIN, MERGE JOIN, or HASH JOIN in the whole query. If you specify more than one join hint, the optimizer selects the least expensive join strategy from the allowed ones. If you specify a join hint in the same query's FROM clause...