The decode function can be used in SQL for and IF-THEN-ELSE construction. It's an alternative for the CASE statement which was introduced in Oracle 8. Syntax: decode( expression , compare_value, return_value, [,compare, return_value] ... [,default_return_value] ) with: expression is t...
Structure of PL/pgSQL Supported PL/pgSQL statements Materialized views Materialized view queries Automatic query rewriting to use materialized views Materialized views on external data lake tables Refreshing a materialized view Automated materialized views Using a user-defined function (UDF) in a materiali...
Authentication takes a variable number of client and server steps depending on the security mechanism that is used. The SASL client callssasl_client_start()with a list of security mechanisms to use. This list typically comes from the server.libsaslselects the best mechanism to use for this SAS...
decode('utf-8')) # Create a serial instance using PySerial's RFC2217 handler. Connects to the IP address specified and the port number (default 9001). # Baud rate of 115200, 8 bits, no parity, 1 stop bit, do not open the port until open() is called. # Using RFC2217, you can ...
Oracle stores information in memory caches and on disk. Memory access is much faster than disk access. Disk access (physical I/O) take a significant amount of time, compared with memory access, typically in the order of 10 milliseconds. Physical I/O also increases the CPU resources required,...
"The function evaluation requires all threads to run" while accessing music library through wmp.dll "The left-hand side of an assignment must be a variable, property or indexer". Help? "The remote server returned an error: (401) Unauthorized" "Typewriter" like effect in a C# Console applica...
The complete guide to SQL COALESCE. Learn the syntax, parameters, use cases and find practical examples in the Hightouch SQL Dictionary.
可以在/etc/portage/make.conf和/或/etc/portage/package.use中更改它们。 可以在命令行上临时设置一个 USE 标志,以检查它对依赖项的影响,然后再将其写入/etc/portage/package.use: user $USE="[USE flag to test]" emerge --pretend --verbose <package name> ...
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You can force MySQL to accept spaces after the function name by starting mysqld with --ansi or using the CLIENT_IGNORE_SPACE to mysql_connect( ), but in this case all function names will become reserved words. See Section 1.7.2. For the sake of brevity, examples display the output from...