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| columnname | cleaned | dedupedspaces |
|---|---|---|
| this is ! Alex23 & and % doing/ *SQL2019 | this is Alex23 and doing SQL2019 | this is Alex23 and doing SQL2019 |
| ABC 123 | ABC 123 | ABC 123 |
| @#$% | ||
| a←b↑c→d↓e | abcde | abcde |
| null | null | null |