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https://dev.mysql.com/doc/refman/8.4/en/bit-functions.html
Table 14.17 Bit Functions and Operators Name Description & Bitwise AND >> Right shift << Left shift ^ Bitwise XOR BIT_COUNT() Return the number of bits that are set | Bitwise OR ~ Bitwise inversion The following list describes available bit ...The ...
https://dev.mysql.com/doc/refman/8.4/en/charset-binary-collations.html
The example also shows how to use the INFORMATION_SCHEMA COLLATIONS table to determine the pad attribute for collations. This section describes how the binary collation for binary strings compares to _bin collations for nonbinary strings. Binary ...
https://dev.mysql.com/doc/refman/8.4/en/comparison-operators.html
Table 14.4 Comparison Operators Name Description > Greater than operator >= Greater than or equal operator < Less than operator <>, != Not equal operator <= Less than or equal operator <=> NULL-safe equal to operator = Equal operator BETWEEN ...
https://dev.mysql.com/doc/refman/8.4/en/error-interfaces.html
SHOW ENGINE INNODB STATUS statement output includes information about the most recent foreign key error if a CREATE TABLE statement for an InnoDB table fails. Error messages can originate on the server side or the client side, and each error ...
https://dev.mysql.com/doc/refman/8.4/en/generated-column-index-optimizations.html
For example: CREATE TABLE t1 (f1 INT, gc INT AS (f1 + 1) STORED, INDEX (gc)); The generated column, gc, is defined as the expression f1 + 1. row *************************** id: 1 select_type: SIMPLE table: t1 partitions: NULL type: range ...The ...
https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-2.html
Bugs Fixed InnoDB: In some cases, following the creation of a very large number of tables (8001 or more), the server could not be restarted successfully. (Bug #110402, Bug #35200385) Group Replication: Running a CREATE TABLE ... (Bug #36808732) ...
https://dev.mysql.com/doc/relnotes/connector-j/en/news-8-0-19.html
It is suitable for use with MySQL Server versions 8.0, 5.7, and 5.6. When using connection pooling, Connector/J keeps track of any host it failed to connect to and, for a short waiting period after the failure, avoids connecting to it during the ...
https://dev.mysql.com/doc/connectors/en/connector-python-api-errors-integrityerror.html
The following example shows a duplicate key error raised as IntegrityError: cursor.execute("CREATE TABLE t1 (id int, PRIMARY KEY (id))") try: cursor.execute("INSERT INTO t1 (id) VALUES (1)") cursor.execute("INSERT INTO t1 (id) VALUES (1)") except ...
https://dev.mysql.com/doc/connector-python/en/connector-python-api-errors-integrityerror.html
The following example shows a duplicate key error raised as IntegrityError: cursor.execute("CREATE TABLE t1 (id int, PRIMARY KEY (id))") try: cursor.execute("INSERT INTO t1 (id) VALUES (1)") cursor.execute("INSERT INTO t1 (id) VALUES (1)") except ...
https://dev.mysql.com/doc/refman/8.4/en/bit-value-literals.html
To convert a bit value to printable form, use it in numeric context or use a conversion function such as BIN() or HEX(). A leading 0b is case-sensitive and cannot be written as 0B. In numeric contexts, MySQL treats a bit literal like an integer. To ...
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