Search: "null"
MySQL Database Replication on Ubuntu blog
(50) NOT NULL) Engine = InnoDB; ``` Then, we can load sample data into the table by running the SQL commands below one by one ...
Optimizing MySQL Composite Index in InnoDB blog
+----+-------------+------------+-------+------------------------------------------+------------------+---------+------+--------+-------------+ SIMPLE range idx_audit_status NULL Using where Improvement idea 2, where the ...
Rewriting the Execution Plan in the EMR Spark Relational Cache blog
. When a table with a PK and a table pointed to by a non-null FK are joined on a FK, the number of records will not change ...
ApsaraDB for Memcache: Managed Memory Based Caching Service - Alibaba Cloud Product
triggers a data read request (a=?), it accesses Memcached server for the first time which returns a null value as no data exists in ...
Send and receive delayed messages - Message Queue Documentation
the message in synchronous mode. The message is sent if no exception is thrown. if (sendResult ! = null ...
Send and receive normal messages - Message Queue Documentation
be null. Serialization and deserialization methods need to be negotiated and remain consistent between the producer and the ...
Multiple-row operations - Table Store Documentation
the value of next_start_primary_key is not null, more data exists and reading continues. while next_start_primary_key is ...
SQL summary - MaxCompute Documentation
LIFECYCLE LIKE LIMIT MAPJOIN NOT NULL ON OR ORDER OUTER OVERWRITE PARTITION RENAME REPLACE RIGHT RLIKE SELECT SORT STRING ...
Input and Output - MaxCompute Documentation
function, users can obtain corresponding Table information of the current record. The input can be null. View as an input is ...