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https://dev.mysql.com/doc/refman/8.0/en/string-literals.html
MySQL recognizes the escape sequences shown in Table 11.1, “Special Character Escape Sequences”. For the escape sequences that represent each of these characters, see Table 11.1, “Special Character Escape Sequences”. A string is a sequence ...
https://dev.mysql.com/doc/refman/8.0/en/timestamp-lookups.html
In the preceding discussion, the data set stored in tstable happens to consist of distinct UTC values. If the index is not UNIQUE, it is possible for the table (and the index) to store multiple instances of a given UTC value. Temporal values are ...
https://dev.mysql.com/doc/refman/8.0/en/no-matching-rows.html
You can create a test file by dumping the tables with mysqldump --quick db_name tbl_name_1 ... If you have a complicated query that uses many tables but that returns no rows, you should use the following procedure to find out what is wrong: Test ...
https://dev.mysql.com/doc/refman/8.0/en/resetting-permissions.html
Create a text file containing the password-assignment statement on a single line. If you start the server as root without using --user=mysql, the server may create root-owned files in the data directory, such as log files, and these may cause ... If ...
https://dev.mysql.com/doc/refman/8.0/en/set.html
A SET is a string object that can have zero or more values, each of which must be chosen from a list of permitted values specified when the table is created. Trailing spaces are automatically deleted from SET member values in the table definition ...SET column values that consist of multiple set members are specified with members separated by commas ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf16.html
The utf16 character set is the ucs2 character set with an extension that enables encoding of supplementary characters: For a BMP character, utf16 and ucs2 have identical storage characteristics: same code values, same encoding, same length. For a ...
https://dev.mysql.com/doc/refman/8.0/en/connection-options.html
This section describes options supported by most MySQL client programs that control how client programs establish connections to the server, whether connections are encrypted, and whether connections are compressed. Command Options for Connection ...These options can be given on the command line or in an option ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-exclusive-to-cluster.html
NDB Cluster has the following limitations or restrictions with regard to binary logging: NDB Cluster cannot produce a binary log for tables having BLOB columns but no primary key. The following are limitations specific to the NDB storage engine: ...
https://dev.mysql.com/doc/refman/8.0/en/network-namespace-support.html
Each namespace has its own IP addresses, network interfaces, routing tables, and so forth. Group Replication, only when using the MySQL communication stack to establish group communication connections (from MySQL 8.0.27). (For example, Linux.) Any ... A network namespace is a logical copy of the network stack from the host ...
https://dev.mysql.com/doc/refman/8.0/en/thread-pool-operation.html
As connections are established, the thread pool assigns them to thread groups in round-robin fashion. For example, if parallel transactions affect index creation or an online buffer pool resizing operation, you can configure a transaction delay to ... The thread pool consists of a number of thread groups, each of which manages a set of client ...