DELIMITER // CREATE PROCEDURE get_last_record() BEGIN DECLARE cursor_name CURSOR FOR SELECT id, name FROM users ORDER BY id; DECLARE rows_count INT DEFAULT 0; DECLARE counter INT DEFAULT 1; DECLARE last_record_id INT; DECLARE last_record_name VARCHAR(255); OPEN cursor_name; SELECT FOUND_...
When I want to get the last record (16-1000) I use: SELECT DISTINCT field_form_new_cert_number_value AS NUM FROM field_data_field_form_new_cert_number ORDER BY (CAST(SUBSTRING_INDEX(field_form_new_cert_number_value,'-',1)AS INT)), (CAST(SUBSTRING_INDEX(field_form_new_cert_number...
We want a query to get either first or last record in each user_id group. i.e. ( first or last records with user_id = 1, 2 ). Here are possible solutions, their “Explain” statements and performance matrix (every query executed 3 times to check timing) to check whic...
在CodeIgniter中,可以使用Active Record类来执行数据库查询。Active Record类提供了一种简单而强大的方式来构建和执行数据库查询。 要获取最后执行的查询,可以使用last_query()方法。该方法返回最后一次执行的完整查询语句。 下面是一个示例代码: 代码语言:php ...
"last_altered": 20210202041702, "last_checked_for_upgrade_version_id": 0, "mysql_version_id": 80023, "name": "t2", "options": "avg_row_length=0;key_block_size=0;keys_disabled=0;pack_record=1;stats_auto_recalc=0;stats_sample_pages=0;", "partition_expression": "", "partition_expr...
processElement(ProcTimeDeduplicateKeepLastRowFunction.java:29) at org.apache.flink.streaming.api.operators.KeyedProcessOperator.processElement(KeyedProcessOperator.java:83) at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:191) at org....
metricsTracker.recordConnectionTimeout(); String sqlState = null; //获取最后一次连接失败的异常 final Throwable originalException = getLastConnectionFailure(); if (originalException instanceof SQLException) { sqlState = ((SQLException) originalException).getSQLState(); ...
. Each time Logtail executes the SELECT statement, the system saves the ID of the last data record as the checkpoint. The next time Logtail executes the SELECT statement, the question mark (?) that is specified in the SELECT statement is replaced with the ID that corresponds to the saved ...
#4 0x0000000003384764 in get_quick_record_count (thd=0x7f59d160b000, tab=0x7f59cf4dd690, limit=18446744073709551615) at /flash11/daoke.wangc/PolarDB_80/sql/sql_optimizer.cc:5980 #5 0x0000000003383c40 in JOIN::estimate_rowcount (this=0x7f59cf4dbc68) at /flash11/daoke.wangc/PolarDB_80...
> properly representative structure and dataset, as > per the Sticky at the top of the forum. Fare enough. I will get something more substantial together. I see i had a rouge comma in there. Thanks. Sorry, you can't reply to this topic. It has been closed....