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SQL Server uses common table expression (CTE) recursion

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1  withCompanynodes (Parentnodeid,nodeid,nodetypeid, Level) as2 (3  　　 SelectN.parentnodeid,n.nodeid,n.nodetypeid,0  Level4  　　  fromTblclient_companyowner asOInner JoinTblsys_node asN onO.nodeid=N.nodeid5  　　 whereO.companyid=2386  　　 Union  All7  　　 SelectN.parentnodeid,n.nodeid,n.nodetypeid,companynodes. Level+18  　　  fromCompanynodesInner JoinTblsys_node N onCompanynodes.nodeid=N.parentnodeid9 )Ten  One Select *  fromCompanynodeswhereNodetypeid=4

SQL Server uses common table expression (CTE) recursion

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