While SQL is inherently a declarative language, meaning it focuses on what data to retrieve, rather than how to retrieve it, there are scenarios where we might need to perform iterative operations. SQL provides a few methods to help us loop through records in database management systems likeMyS...
;COMMIT;EXCEPTION WHEN errors THEN -- Populate V_EXC_IND_TAB collection to be used in the VALUES -- OF clause FOR i in 1.. SQL%BULK_EXCEPTIONS.COUNT LOOP exc_ind_tab(i) := SQL%BULK_EXCEPTIONS(i).error_index; END LOOP; -- Insert records that caused exceptions in the TEST_EXC --...
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https://stackoverflow.com/questions/28506747/sql-loop-through-each-row-in-a-table Based on the caption of your question. This is the way I loop through each row of a table using a variable of typeTABLE: AI检测代码解析 DECLARE@counterINT=1,@maxINT=0--Declare a variable of type TABLE. ...
partitionConsumerRecordsHandler(KafkaFetcher.java:179) ~[plugin_ne-flink-1.12.4-1.1.1_scala2.12_hive2.1.1-3.8.0-1.2.2-SNAPSHOT.jar:?] at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.runFetchLoop(KafkaFetcher.java:142) ~[plugin_ne-flink-1.12.4-1.1.1_scala2.12_hive...
如果是in,那么先执行子查询。 in 是把外表和内表作 hash 连接,而 exists 是对外表作 loop 循环,每次 loop 循环再对内表进行查询。所以,我们会以驱动表的快速返回为目标,目标是以小表驱动大表,这是性能优化的本质。 之前有一种比较扯淡的说法,“exists 比 in 效率高”,大家试想一下,如何一个事物在任何场景...
Large pages are allocated at startup and are kept throughout the lifetime of the process. Trace Flag 834 improves performance by increasing the efficiency of the translation look-aside buffer (TLB) in the CPU. In other words, Trace Flag 834 increases the efficiency of managing physical to ...
The procedure in the remote server is executed, and the result sets are returned to the local server and loaded into the table in the local server. In a distributed transaction, execute_statement cannot be issued against a loopback linked server when the connection has multiple active result ...
任务运行时异常:java.lang.RuntimeException: Writing records to JDBC failed. 问题描述/异常栈 2021-11-29 18:51:53 java.lang.RuntimeException: Writing records to JDBC failed. at org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.checkFlushException(JdbcBatchingOutputFormat.java:154) at ...
FORiINnames.FIRST .. names.LASTLOOP IFnames(i) ='J Hamil'THEN NULL; ENDIF; ENDLOOP; END; 例二:把嵌套表元素作为参数传递 这个例子中我们在调用子程序时引用了集合中的元素: DECLARE TYPErosterISTABLEOFVARCHAR2(15); names roster := roster('J Hamil', ...