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Combine two column helper tables into one

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Terry Sutton committed 2022-06-27 16:22:51 -02:30
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apps/temp-docs/docs/guides/database/tables.mdx
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@@ -77,83 +77,55 @@ create table todos (
### Data types
Every column is a predefined type. PostgreSQL provides many [default types](https://www.postgresql.org/docs/current/datatype.html), and you can even design your own (or use extensions) if the default types don't fit your needs.
Here's a list of the data types that are available to use in the table editor in the Dashboard:
| `Name` | `Description` | `Example` |
| ------------------------------------------- | -------------------- | ----------------------------------------------------------------- |
| int2 | Can contain numbers between -32,768 and 32,767 | For storing numbers like ages of people, distance between places or numbers you know will be fairly small. |
| int4 | Can contain numbers between -2,147,483,648 and +2,147,483,648 | For storing numbers like the population of small towns or cities that you know will be less than about 2 billion. |
| int8 | Can contain numbers between 9,223,372,036,854,775,808 and +9,223,372,036,854,775,808 | For storing numbers larger than roughly 2 billion. Like the number of people who live in the Northern vs Southern hemisphere or the total number of COVID-19 vaccinations administered. |
| float4 | Can contain numbers with up to 6 decimal places | For storing things like temperature (22.5 degrees Celsius) or distance (10.25kms)|
| float8 | Can contain numbers with up to 15 decimal places | For storing numbers with a high level of precision, like scientific or mathematical data. |
| numeric | Can contain 131,072 digits before the decimal point and 16,383 digits after the decimal point. | For storing number that require very high precision. Use the numeric type when you need more precision than float4 or float8 offer. |
| json | Can contain JSON data. | For storing data that logically belongs together, like a person's street address. Useful for when you want to store dynamic fields and not have every field represented as a column in your table. |
| jsonb | The JSONB type stores your JSON input as a binary code instead of as an exact copy of the JSON data. JSONB is faster, more efficient and supports indexing. | If you are doing a lot of JSON manipulation in Postgres you should consider using JSONB for efficiency. Otherwise, if you are just doing typical data storing and fetching, JSON should be fine. |
| text | Can contain strings of any length. | For storing any kind of textual data. Examples include text contents of recipes or blog posts. This is the general purpose data type for textual content. |
| varchar | Can contain strings with a fixed length | For storing a string where you would want to limit the length to 160 characters. |
| uuid | Can store a universal unique identifier. | For storing unique IDs, like when you need to store a reference to another table row. |
| date | Can store a data value without time. | For storing dates like birthdays or holidays with a year, month and day. |
| time | Can store the time of day | For storing things like when a process starts and stops at specific times in the day. The lights come on at 6:00:00 a.m. and go off at 10:00:00 p.m. |
| timez | Can store the time of day, along with a timezone. | For storing things like event start times, like an Apple event starting at 10:00:00 a.m. Pacific Time. |
| timestamp | Can store the date and time without a timezone. | For storing times like: May 1st, 2022 at 10 a.m. |
| timestampz | Can store the date and time with a timezone. | For storing times like: May 1st, 2022 at 10 a.m, Pacific Time. |
| bool | Can store boolean values | For storing things that will be true or false, like user_is_subscribed or show_homepage_ad. |
Here's a complete list of all of the default data types provided by Postgres:
Every column is a predefined type. PostgreSQL provides many [default types](https://www.postgresql.org/docs/current/datatype.html), and you can even design your own (or use extensions) if the default types don't fit your needs. Here's a complete list of all of the default data types provided by Postgres:
<details>
<summary>Show/Hide default data types</summary>
| `Name` | `Aliases` | `Description` |
| `Name` | `Aliases` | `Description` |
| ------------------------------------------- | -------------------- | ----------------------------------------------------------------- |
| bigint | int8 | signed eight-byte integer |
| bigserial | serial8 | autoincrementing eight-byte integer |
| bit | | fixed-length bit string |
| bit varying | varbit | variable-length bit string |
| boolean | bool | logical Boolean (true/false) |
| box | | rectangular box on a plane |
| bytea | | binary data (“byte array”) |
| character | char | fixed-length character string |
| character varying | varchar | variable-length character string |
| cidr | | IPv4 or IPv6 network address |
| circle | | circle on a plane |
| date | | calendar date (year, month, day) |
| double precision | float8 | double precision floating-point number (8 bytes) |
| inet | | IPv4 or IPv6 host address |
| integer | int, int4 | signed four-byte integer |
| interval \[ fields \] | | time span |
| json | | textual JSON data |
| jsonb | | binary JSON data, decomposed |
| line | | infinite line on a plane |
| lseg | | line segment on a plane |
| macaddr | | MAC (Media Access Control) address |
| macaddr8 | | MAC (Media Access Control) address (EUI-64 format) |
| money | | currency amount |
| numeric | decimal | exact numeric of selectable precision |
| path | | geometric path on a plane |
| pg\_lsn | | PostgreSQL Log Sequence Number |
| pg\_snapshot | | user-level transaction ID snapshot |
| point | | geometric point on a plane |
| polygon | | closed geometric path on a plane |
| real | float4 | single precision floating-point number (4 bytes) |
| smallint | int2 | signed two-byte integer |
| smallserial | serial2 | autoincrementing two-byte integer |
| serial | serial4 | autoincrementing four-byte integer |
| text | | variable-length character string |
| time \[ without time zone \] | | time of day (no time zone) |
| time with time zone | timetz | time of day, including time zone |
| timestamp \[ without time zone \] | | date and time (no time zone) |
| timestamp with time zone | timestamptz | date and time, including time zone |
| tsquery | | text search query |
| tsvector | | text search document |
| txid\_snapshot | | user-level transaction ID snapshot (deprecated; see pg\_snapshot) |
| uuid | | universally unique identifier |
| xml | | XML data |
| bigint | int8 | Signed eight-byte integer. For numbers ranging from -9223372036854775808 to +9223372036854775807. |
| bigserial | serial8 | Autoincrementing eight-byte integer. For numbers ranging from 1 to 9223372036854775807. |
| bit | | Fixed-length bit string. |
| bit varying | varbit | Variable-length bit string. |
| boolean | bool | Logical Boolean (true/false). |
| box | | Rectangular box on a plane. |
| bytea | | Binary data (“byte array”). |
| character | char | Fixed-length character string. |
| character varying | varchar | Variable-length character string. |
| cidr | | IPv4 or IPv6 network address. |
| circle | | Circle on a plane. |
| date | | Calendar date (year, month, day). |
| double precision | float8 | Double precision floating-point number (8 bytes). 15 decimal digits of precision. |
| inet | | IPv4 or IPv6 host address. |
| integer | int, int4 | Signed four-byte integer. -2147483648 to +2147483647. |
| interval \[ fields \] | | Time span. |
| json | | Textual JSON data. |
| jsonb | | Binary JSON data, decomposed. If you are doing a lot of JSON manipulation in Postgres you should consider using JSONB for efficiency. Otherwise, if you are just doing typical data storing and fetching, JSON should be fine. |
| line | | Infinite line on a plane. |
| lseg | | Line segment on a plane. |
| macaddr | | MAC (Media Access Control) address. |
| macaddr8 | | MAC (Media Access Control) address (EUI-64 format). |
| money | | currency. |
| numeric | decimal | Exact numeric of selectable precision. Up to 131072 digits before the decimal point; up to 16383 digits after. For storing number that require very high precision. Use the numeric type when you need more precision than float4 or float8 offer. |
| path | | Geometric path on a plane. |
| pg\_lsn | | PostgreSQL Log Sequence Numb. |
| pg\_snapshot | | User-level transaction ID snapshot. |
| point | | Geometric point on a plane. |
| polygon | | Closed geometric path on a plane. |
| real | float4 | Single precision floating-point number (4 byte). 6 decimal digits precision. |
| smallint | int2 | Signed two-byte integer. For numbers ranging from -32768 to +32767 |
| smallserial | serial2 | Autoincrementing two-byte integer. For numbers ranging from 1 to 32767. |
| serial | serial4 | Autoincrementing four-byte integer. For numbers ranging from 1 to 2147483647 |
| text | | Variable-length character string. This is the general purpose data type for textual content. |
| time \[ without time zone \] | | Time of day (no time zone). |
| time with time zone | timetz | Time of day, including time zone. |
| timestamp \[ without time zone \] | | Date and time (no time zone). |
| timestamp with time zone | timestamptz | Date and time, including time zone. |
| tsquery | | Text search query. |
| tsvector | | Text search document . |
| txid\_snapshot | | User-level transaction ID snapshot (deprecated; see pg\_snapshot). |
| uuid | | Universally unique identifier. |
| xml | | XML data. |
</details>
web/docs/guides/database/tables.mdx
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@@ -111,57 +111,56 @@ Here's a list of the data types that are available to use in the table editor in
Here's a complete list of all of the default data types provided by Postgres:
<details>
<summary>View all default data types</summary>
<summary>Show/Hide default data types</summary>
| `Name` | `Aliases` | `Description` |
| `Name` | `Aliases` | `Description` |
| ------------------------------------------- | -------------------- | ----------------------------------------------------------------- |
| bigint | int8 | signed eight-byte integer |
| bigserial | serial8 | autoincrementing eight-byte integer |
| bit | | fixed-length bit string |
| bit varying | varbit | variable-length bit string |
| boolean | bool | logical Boolean (true/false) |
| box | | rectangular box on a plane |
| bytea | | binary data (“byte array”) |
| character | char | fixed-length character string |
| character varying | varchar | variable-length character string |
| cidr | | IPv4 or IPv6 network address |
| circle | | circle on a plane |
| date | | calendar date (year, month, day) |
| double precision | float8 | double precision floating-point number (8 bytes) |
| inet | | IPv4 or IPv6 host address |
| integer | int, int4 | signed four-byte integer |
| interval \[ fields \] | | time span |
| json | | textual JSON data |
| jsonb | | binary JSON data, decomposed |
| line | | infinite line on a plane |
| lseg | | line segment on a plane |
| macaddr | | MAC (Media Access Control) address |
| macaddr8 | | MAC (Media Access Control) address (EUI-64 format) |
| money | | currency amount |
| numeric | decimal | exact numeric of selectable precision |
| path | | geometric path on a plane |
| pg\_lsn | | PostgreSQL Log Sequence Number |
| pg\_snapshot | | user-level transaction ID snapshot |
| point | | geometric point on a plane |
| polygon | | closed geometric path on a plane |
| real | float4 | single precision floating-point number (4 bytes) |
| smallint | int2 | signed two-byte integer |
| smallserial | serial2 | autoincrementing two-byte integer |
| serial | serial4 | autoincrementing four-byte integer |
| text | | variable-length character string |
| time \[ without time zone \] | | time of day (no time zone) |
| time with time zone | timetz | time of day, including time zone |
| timestamp \[ without time zone \] | | date and time (no time zone) |
| timestamp with time zone | timestamptz | date and time, including time zone |
| tsquery | | text search query |
| tsvector | | text search document |
| txid\_snapshot | | user-level transaction ID snapshot (deprecated; see pg\_snapshot) |
| uuid | | universally unique identifier |
| xml | | XML data |
| bigint | int8 | Signed eight-byte integer. For numbers ranging from -9223372036854775808 to +9223372036854775807. |
| bigserial | serial8 | Autoincrementing eight-byte integer. For numbers ranging from 1 to 9223372036854775807. |
| bit | | Fixed-length bit string. |
| bit varying | varbit | Variable-length bit string. |
| boolean | bool | Logical Boolean (true/false). |
| box | | Rectangular box on a plane. |
| bytea | | Binary data (“byte array”). |
| character | char | Fixed-length character string. |
| character varying | varchar | Variable-length character string. |
| cidr | | IPv4 or IPv6 network address. |
| circle | | Circle on a plane. |
| date | | Calendar date (year, month, day). |
| double precision | float8 | Double precision floating-point number (8 bytes). 15 decimal digits of precision. |
| inet | | IPv4 or IPv6 host address. |
| integer | int, int4 | Signed four-byte integer. -2147483648 to +2147483647. |
| interval \[ fields \] | | Time span. |
| json | | Textual JSON data. |
| jsonb | | Binary JSON data, decomposed. If you are doing a lot of JSON manipulation in Postgres you should consider using JSONB for efficiency. Otherwise, if you are just doing typical data storing and fetching, JSON should be fine. |
| line | | Infinite line on a plane. |
| lseg | | Line segment on a plane. |
| macaddr | | MAC (Media Access Control) address. |
| macaddr8 | | MAC (Media Access Control) address (EUI-64 format). |
| money | | currency. |
| numeric | decimal | Exact numeric of selectable precision. Up to 131072 digits before the decimal point; up to 16383 digits after. For storing number that require very high precision. Use the numeric type when you need more precision than float4 or float8 offer. |
| path | | Geometric path on a plane. |
| pg\_lsn | | PostgreSQL Log Sequence Numb. |
| pg\_snapshot | | User-level transaction ID snapshot. |
| point | | Geometric point on a plane. |
| polygon | | Closed geometric path on a plane. |
| real | float4 | Single precision floating-point number (4 byte). 6 decimal digits precision. |
| smallint | int2 | Signed two-byte integer. For numbers ranging from -32768 to +32767 |
| smallserial | serial2 | Autoincrementing two-byte integer. For numbers ranging from 1 to 32767. |
| serial | serial4 | Autoincrementing four-byte integer. For numbers ranging from 1 to 2147483647 |
| text | | Variable-length character string. This is the general purpose data type for textual content. |
| time \[ without time zone \] | | Time of day (no time zone). |
| time with time zone | timetz | Time of day, including time zone. |
| timestamp \[ without time zone \] | | Date and time (no time zone). |
| timestamp with time zone | timestamptz | Date and time, including time zone. |
| tsquery | | Text search query. |
| tsvector | | Text search document . |
| txid\_snapshot | | User-level transaction ID snapshot (deprecated; see pg\_snapshot). |
| uuid | | Universally unique identifier. |
| xml | | XML data. |
</details>
<br />
You can "cast" columns from one type to another, however there can be some incompatibilities between types.