Read e-book online Apprendre SQL avec MySQL : avec 40 exercices corrigés PDF

By Christian Soutou

ISBN-10: 2212119151

ISBN-13: 9782212119152

ISBN-10: 2212850565

ISBN-13: 9782212850567

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This means that if you just type initdb, then the system will not find the executable, and you will get an error message. 37 Exploring the Database This may look like a bug, but in fact it is the desired behavior. Instead of directly accessing initdb, you are supposed to use the pg_createcluster utility from postgresqlcommon, which will select the right initdb depending on the major version you specify. If you plan to run more than one database server on the same host, you must set the preceding variables differently for each server, as they mandate the name of the data directory.

Maintenance. Minor release level. 3. There is also a separate version of the manual, so if something doesn't work exactly the way you think it should, you must consult the correct version of the manual. 32 Chapter 2 Maintenance software releases are identified by the full three-part numbering scheme. 1 is a later maintenance release. org/ support/versioning/. This article explains that each release will be supported for a period of 5 years. 4, were de-supported in July 2014. 0 and higher versions will be supported.

484+01 (1 row) The –c command is noninteractive. If we want to execute multiple commands, we can write those commands in a text file and then execute them using the –f option. sql script is very similar to a dump file produced by PostgreSQL backup tools, so this type of file and the output it produces are very common. When a command is executed successfully, PostgreSQL outputs a "command tag" equal to the name of that command; this is how the preceding output was produced. 20 Chapter 1 psql can also be used in interactive mode, which is the default, so it requires no option: $ psql postgres=# The first interactive command you'll need is the following: postgres=# help You can then type in SQL or other commands.

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Apprendre SQL avec MySQL : avec 40 exercices corrigés by Christian Soutou

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