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nexedi
MariaDB
Commits
a2fc71d3
Commit
a2fc71d3
authored
Dec 05, 2000
by
monty@donna.mysql.com
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Fixed bugs in the manual
parent
5218ca2a
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Docs/manual.texi
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Docs/manual.texi
View file @
a2fc71d3
...
...
@@ -33099,7 +33099,7 @@ simple rename should get your data back.
@cindex changing, column order
@cindex tables, changing column order
@node Change column order, , ALTER TABLE problems, Problems
@
S
ection How To Change the Order of Columns in a Table
@
s
ection How To Change the Order of Columns in a Table
The whole point of SQL is to abstract the application from the data
storage format. You should always specify the order in which you wish to
...
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@@ -33118,9 +33118,10 @@ SELECT col_name1, col_name3, col_name2 FROM tbl_name;
will return columns in the order @code{col_name1}, @code{col_name3}, @code{col_name2}.
You should @strong{NEVER}, in an application, use @code{SELECT *} and
retrieve the columns based on their position, because the order in which columns are
returned @strong{CANNOT} be guaranteed over time. A simple change to
your database may cause your application to fail rather dramatically.
retrieve the columns based on their position, because the order in which
columns are returned @strong{CANNOT} be guaranteed over time. A simple
change to your database may cause your application to fail rather
dramatically.
If you want to change the order of columns anyway, you can do it as follows:
...
...
@@ -33207,7 +33208,7 @@ you are making a copy of the files in the database directory. If you want to
make a SQL level backup of a table, you can use @code{SELECT INTO OUTFILE}.
Another way to back up a database is to use the @code{mysqldump} program:
@xref{mysqldump}
:
@xref{mysqldump}
.
@enumerate
@item
...
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@@ -33234,7 +33235,7 @@ If you have to restore something, try to recover your tables using
@code{myisamchk -r} first. That should work in 99.9% of all cases. If
@code{myisamchk} fails, try the following procedure:
(This will only work if you have started @strong{MySQL} with
@code{--log-update}. @xref{Update log}):
@code{--log-update}. @xref{Update log}
.
):
@enumerate
@item
...
...
@@ -33471,7 +33472,7 @@ when connecting to the @strong{MySQL} server.
@item
If your are using the @strong{MySQL} perl DBD module you can read the options
from the @strong{MySQL} option files. @xref{Option files}
:
from the @strong{MySQL} option files. @xref{Option files}
.
@example
$dsn = "DBI:mysql:test;mysql_read_default_group=client;"
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@@ -33731,7 +33732,7 @@ The number of decimals for numeric fields.
The functions available in the C API are listed below and are described in
greater detail in the next section.
@xref{C API functions}
:
@xref{C API functions}
.
@multitable @columnfractions .3 .7
@item @strong{mysql_affected_rows()} @tab
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