diff options
| author | Peter Eisentraut | 2020-09-04 06:45:57 +0000 |
|---|---|---|
| committer | Peter Eisentraut | 2020-09-04 06:45:57 +0000 |
| commit | 49d7165117893405ae9b5b8d8e7877acff33c0e7 (patch) | |
| tree | 7b9796b80f4a05bfb326431bcf7fced2d236612a | |
| parent | 79fd620b20b7721c2b591ef495be79b6347286c1 (diff) | |
doc: Change table alias names to lower case in tutorial chapter
This is needlessly different from our usual style otherwise.
Author: Jürgen Purtz <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/[email protected]
| -rw-r--r-- | doc/src/sgml/query.sgml | 14 | ||||
| -rw-r--r-- | src/tutorial/basics.source | 12 |
2 files changed, 13 insertions, 13 deletions
diff --git a/doc/src/sgml/query.sgml b/doc/src/sgml/query.sgml index 497aae416b3..e73e805ec4f 100644 --- a/doc/src/sgml/query.sgml +++ b/doc/src/sgml/query.sgml @@ -609,11 +609,11 @@ SELECT * following query: <programlisting> -SELECT W1.city, W1.temp_lo AS low, W1.temp_hi AS high, - W2.city, W2.temp_lo AS low, W2.temp_hi AS high - FROM weather W1, weather W2 - WHERE W1.temp_lo < W2.temp_lo - AND W1.temp_hi > W2.temp_hi; +SELECT w1.city, w1.temp_lo AS low, w1.temp_hi AS high, + w2.city, w2.temp_lo AS low, w2.temp_hi AS high + FROM weather w1, weather w2 + WHERE w1.temp_lo < w2.temp_lo + AND w1.temp_hi > w2.temp_hi; </programlisting> <screen> @@ -624,8 +624,8 @@ SELECT W1.city, W1.temp_lo AS low, W1.temp_hi AS high, (2 rows) </screen> - Here we have relabeled the weather table as <literal>W1</literal> and - <literal>W2</literal> to be able to distinguish the left and right side + Here we have relabeled the weather table as <literal>w1</literal> and + <literal>w2</literal> to be able to distinguish the left and right side of the join. You can also use these kinds of aliases in other queries to save some typing, e.g.: <programlisting> diff --git a/src/tutorial/basics.source b/src/tutorial/basics.source index 9dbd75eb154..fe1cdfde2a8 100644 --- a/src/tutorial/basics.source +++ b/src/tutorial/basics.source @@ -126,13 +126,13 @@ SELECT * FROM weather LEFT OUTER JOIN cities ON (weather.city = cities.name); -- Suppose we want to find all the records that are in the temperature range --- of other records. W1 and W2 are aliases for weather. +-- of other records. w1 and w2 are aliases for weather. -SELECT W1.city, W1.temp_lo, W1.temp_hi, - W2.city, W2.temp_lo, W2.temp_hi -FROM weather W1, weather W2 -WHERE W1.temp_lo < W2.temp_lo - and W1.temp_hi > W2.temp_hi; +SELECT w1.city, w1.temp_lo, w1.temp_hi, + w2.city, w2.temp_lo, w2.temp_hi +FROM weather w1, weather w2 +WHERE w1.temp_lo < w2.temp_lo + and w1.temp_hi > w2.temp_hi; ----------------------------- |