fix date & add english translation

content/trdsql/24_graph.en.md

@@ -1,7 +1,7 @@
 +++
 author = "Noboru Saito"
 title = "trdsql graph"
-date = "2024-04-19"
+date = "2024-04-18"
 description = "trdsql graph creation method."
 weight = 24
 tags = [

content/trdsql/25_library.en.md

@@ -1,7 +1,7 @@
 +++
 author = "Noboru Saito"
 title = "trdsql library"
-date = "2024-04-19"
+date = "2024-04-18"
 description = "trdsql library usage."
 weight = 25
 tags = [

content/trdsql/26_file_sql.en.md

@@ -1,7 +1,7 @@
 +++
 author = "Noboru Saito"
 title = "trdsql SQL file"
-date = "2024-04-19"
+date = "2024-04-18"
 description = "trdsql SQL file"
 weight = 26
 tags = [

content/trdsql/27_config.en.md

@@ -1,7 +1,7 @@
 +++
 author = "Noboru Saito"
 title = "trdsql config"
-date = "2024-04-19"
+date = "2024-04-18"
 description = "trdsql config"
 weight = 27
 tags = [

content/trdsql/28_cross_join.en.md

@@ -0,0 +1,114 @@
++++
+author = "Noboru Saito"
+title = "trdsql CROSS JOIN"
+date = "2024-04-18"
+description = "trdsql CROSS JOIN"
+weight = 28
+tags = [
+    "trdsql",
+    "CROSS",
+    "JOIN",
+]
+categories = [
+    "trdsql",
+]
++++
+
+`CROSS JOIN` is an easy way to create a total.
+
+a.csv
+
+```CSV
+aa
+ab
+ac
+```
+
+b.csv
+
+```CSV
+ba
+bb
+bc
+```
+
+When you `CROSS JOIN` two CSV files, a 3x3 output is possible for all combinations.
+
+```console
+trdsql "SELECT * FROM a.csv CROSS JOIN b.csv"
+aa,ba
+aa,bb
+aa,bc
+ab,ba
+ab,bb
+ab,bc
+ac,ba
+ac,bb
+ac,bc
+```
+
+You can also self-join a single file.
+For example, let's create a home and away total table.
+
+cleague.csv
+
+```CSV
+team
+Giants
+DeNA
+Tigers
+Carp
+Dragons
+Swallows
+```
+
+To simply `CROSS JOIN`, it looks like this (you can't write JOIN conditions because there are none).
+
+```console
+trdsql -ih \
+"SELECT h.team,a.team "\
+"  FROM cleague.csv AS h "\
+" CROSS JOIN cleague.csv AS a"
+```
+
+You can't play against your own team, so exclude the same team with `WHERE h.team != a.team`.
+
+```console
+trdsql -ih -omd \
+"SELECT h.team AS home,a.team AS aware " \
+"  FROM cleague.csv AS h CROSS JOIN cleague.csv AS a "\
+" WHERE h.team != a.team "
+```
+
+|   home   |  aware   |
+|----------|----------|
+| Giants     | DeNA     |
+| Giants     | Tirgers     |
+| Giants     | Carp     |
+| Giants     | Dragons     |
+| Giants     | Swallows |
+| DeNA     | Giants     |
+| DeNA     | Tirgers     |
+| DeNA     | Carp     |
+| DeNA     | Dragons     |
+| DeNA     | Swallows |
+| Tirgers     | Giants     |
+| Tirgers     | DeNA     |
+| Tirgers     | Carp     |
+| Tirgers     | Dragons     |
+| Tirgers     | Swallows |
+| Carp     | Giants     |
+| Carp     | DeNA     |
+| Carp     | Tirgers     |
+| Carp     | Dragons     |
+| Carp     | Swallows |
+| Dragons     | Giants     |
+| Dragons     | DeNA     |
+| Dragons     | Tirgers     |
+| Dragons     | Carp     |
+| Dragons     | Swallows |
+| Swallows | Giants     |
+| Swallows | DeNA     |
+| Swallows | Tirgers     |
+| Swallows | Carp     |
+| Swallows | Dragons     |

content/trdsql/29_generate_series.en.md

@@ -0,0 +1,117 @@
++++
+author = "Noboru Saito"
+title = "trdsql generate_series"
+date = "2024-04-18"
+description = "trdsql generate_series"
+weight = 29
+tags = [
+    "trdsql",
+    "generate_series",
+    "PostgreSQL",
+]
+categories = [
+    "trdsql",
+]
++++
+
+## generate_series
+
+PostgreSQL has a convenient function called `generate_series()`.
+This function works similarly to the Unix `seq` command. `generate_series()` also has an extension that can be used with timestamp types.
+
+The usage is simple. Specify the "start value", "end value", and "increment value (optional)" and execute.
+
+```console
+trdsql -driver postgres -dsn "dbname=trdsql_test" "SELECT * FROM generate_series(1,10)"
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+```
+
+`generate_series()` is a function that returns a table and can be used instead of a table.
+(en: You can also write `SELECT generate_series(1,10)`).
+
+Of course, trdsql can easily incorporate input from external sources, so you can also use the `seq` command as a substitute.
+
+```console
+seq 1 10|trdsql "SELECT * FROM -"
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+```
+
+The order of arguments for the `seq` command is "start value", "increment value (optional)", "end value".
+
+## Timestamp
+
+`generate_series()` can handle timestamps, so it's a bit tricky to output the 2020 calendar in Japanese, but it looks like this.
+
+```console
+trdsql -driver postgres -dsn "dbname=trdsql_test" \
+"SET LC_TIME='C'; " \
+"SELECT day " \
+"  FROM generate_series('2024-01-1'::timestamp,'2024-12-31','1 day') as day"
+2024-01-01T00:00:00Z
+2024-01-02T00:00:00Z
+2024-01-03T00:00:00Z
+2024-01-04T00:00:00Z
+....
+2024-12-29T00:00:00Z
+2024-12-30T00:00:00Z
+2024-12-31T00:00:00Z
+```
+
+## Increase the amount of data
+
+There are times when you want a certain amount of dummy data. If you want completely distributed random data, you need to use a dedicated tool.
+However, if you just want to increase the number of existing data, you can create it by CROSS JOINing `generate_series()` or the `seq` command.
+
+```console
+ trdsql  -driver postgres -dsn "dbname=trdsql_test" -ih -oh \
+ "SELECT ROW_NUMBER() OVER() AS id, name " \
+ "  FROM header.csv CROSS JOIN generate_series(1,3) AS s"
+id,name
+1,Orange
+2,Melon
+3,Apple
+4,Orange
+5,Melon
+6,Apple
+7,Orange
+8,Melon
+9,Apple
+```
+
+Using the seq command, it looks like this.
+
+(When processing a file with a header with -ih, the first line of `seq` is interpreted as a header, so starting from 0 will result in an extra line being output).
+
+```console
+seq 0 3|trdsql -driver sqlite3 -ih -oh \
+"SELECT ROW_NUMBER() OVER() AS id, name " \
+ " FROM - CROSS JOIN header.csv"
+id,name
+1,Orange
+2,Melon
+3,Apple
+4,Orange
+5,Melon
+6,Apple
+7,Orange
+8,Melon
+9,Apple
+```