Prevent bad data being selected with SQL Server COLLATE -

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i have 2 databases , moving data 1 database another. on columns need resolve collation conflict between "latin1_general_ci_as" , "latin1_general_ci_ai". do:

select [column] collate latin1_general_ci_ai            xxx

this works in main in fields see characters like:

�

in data has been copied across. seems characters original db lost when collation changed on new db. know can use replace rid of them, wondered rather search entire record set - there way filter out or prevent special characters coming across in first place?


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