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Copy a column with update and select

Posted By:      Posted Date: August 28, 2010    Points: 0   Category :Sql Server
Hi, I am using SQL Compact 3.5 I am trying to copy the values of a column called "CODIGO" from one table to another table. I mean, I want to copy the column "CODIGO"  from table  "DATOS_ACADEMICOS" to table "ALUMNOS". I use this code: UPDATE ALUMNOS  SET CODIGO=(SELECT DATOS_ACADEMICOS.CODIGO FROM DATOS_ACADEMICOS WHERE DATOS_ACADEMICOS.ALUMNO_ID=ALUMNOS.ID)   But I get an error in the SELECT statment: Major error 0x80040E14, Minor error 25501 [ Token line number = 2,Token line offset = 13,Token in error = SELECT ]   I also tried this code with the same error: UPDATE ALUMNOS  SET CODIGO = (SELECT DATOS_ACADEMICOS.CODIGO             FROM DATOS_ACADEMICOS             WHERE DATOS_ACADEMICOS.ALUMNO_ID=ALUMNOS.ID) WHERE EXISTS (SELECT 1 FROM DATOS_ACADEMICOS WHERE DATOS_ACADEMICOS.ALUMNO_ID=ALUMNOS.ID)   How can I copy from one column to another in a SQL sentence? Thanks    

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