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edited Jul 12, 2019 at 10:12

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edited Jul 12, 2019 at 7:31

I have an PostgreSQL server with an existing table which has an fixed-width-non-unique-string column such as this:

| ID_STRING |
| 'ABCDEFG' |
| 'HIJKLMN' |

Now I want to compute unique integer ids for each element and store them into an additional column. The result should look like this:

| ID_STRING | ID_INT
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2

Is there an easy way to achieve this?

I have an PostgreSQL server with an existing table which has an fixed-width-non-unique-string column such as this:

| ID_STRING |
| 'ABCDEFG' |
| 'HIJKLMN' |

Now I want to compute unique integer ids for each element and store them into an additional column. The result should look like this:

| ID_STRING | ID_INT
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2

Is there an easy way to achieve this?

I have an PostgreSQL server with an existing table which has an fixed-width-non-unique-string column such as this:

| ID_STRING |
| 'ABCDEFG' |
| 'HIJKLMN' |

Now I want to compute integer ids for each element and store them into an additional column. The result should look like this:

| ID_STRING | ID_INT
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2

Is there an easy way to achieve this?

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asked Jul 12, 2019 at 7:17

Create an unique integer id column for an existing string column

I have an PostgreSQL server with an existing table which has an fixed-width-non-unique-string column such as this:

| ID_STRING |
| 'ABCDEFG' |
| 'HIJKLMN' |

Now I want to compute unique integer ids for each element and store them into an additional column. The result should look like this:

| ID_STRING | ID_INT
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2
| 'ABCDEFG' |   1
| 'HIJKLMN' |   2

Is there an easy way to achieve this?

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