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in SQL Server, can i convert a column from being a varchar to an int datatype
| Author | Votes | Δ |
|---|---|---|
| RB. | 1 | +0.86 |
| Mikael Eriksson | 1 | +0.71 |
| Joe | 0 | -1.24 |
| Filip De Vos | 0 | -2.66 |
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