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SQL code:
UPDATE TB SET LJ='1'+LJ



SQL code:
update tb set lj='1/'+lj


SQL code:
update table set lj = '1/'+lj
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SQL code:

UPDATE TB SET LJ='1/'+LJ



SQL code:

update tb set lj='1/'+lj



.

SQL code:
update tb set 1j='1/'+ 1j ;


SQL code:

update table set lj = '1/'+lj



update tb set


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