Updating a table from a join
Without the WHERE clause, rows that do not have a corresponding row in SQL.
NEWPOP would have their Population values updated to missing.
Updating columns which are part of the SHARD key is unsupported.On clause specifies the column names to find matching rows between both tables using Inner Join.SET specifies the Table2 column Name will be updated with values of Table1 name column.My base table has a composite index defined on it hence i would require a update solution which would not delete the index. DATA BASE_TABLE; INFILE DATALINES DELIMITER = '|'; INPUT ID1 : . PDF (US Ltr) - 38.2Mb PDF (A4) - 38.2Mb PDF (RPM) - 37.1Mb HTML Download (TGZ) - 10.2Mb HTML Download (Zip) - 10.3Mb HTML Download (RPM) - 9.0Mb Man Pages (TGZ) - 206.2Kb Man Pages (Zip) - 314.7Kb Info (Gzip) - 3.5Mb Info (Zip) - 3.5Mb My SQL Backup and Recovery My SQL Globalization My SQL Information Schema My SQL Installation Guide My SQL and Linux/Unix My SQL and OS X My SQL Partitioning My SQL Performance Schema My SQL Replication Using the My SQL Yum Repository My SQL Restrictions and Limitations Security in My SQL My SQL and Solaris Building My SQL from Source Starting and Stopping My SQL My SQL Tutorial My SQL and Windows My SQL NDB Cluster 7.5 My SQL 5.7 Secure Deployment Guide option as part of a table reference.If equal value are found in multiple columns from multiple tables, they are returned in the result set.To simplify syntax, T2 is an alias name for Table2, whose rows we want to update based on matching rows with Table1.If you access a column from the table to be updated in an expression, assignments are generally evaluated from left to right.For multiple-table updates, there is no guarantee that assignments are carried out in any particular order. COLUMN2 IS NULLAn outerjoin is performed based on the equijoin condition.from sql.unitedstates;/* use this code to generate output so you don't overwrite the sql.unitedstates table */ options ls=84; proc sql outobs=10; title 'UNITEDSTATES'; create table work.unitedstates as select * from sql.unitedstates; update work.unitedstates as u set population=(select population from sql.newpop as n where u.name=n.state) where in (select state from sql.newpop); select Name format=., Capital format=., Population, Area, Continent format=., Statehood format=date9. UNITEDSTATES table, the in-line view in the SET clause returns a single value. NEWPOP, this value is the value of the Population column from SQL. For rows that do not have a corresponding row in SQL. In both cases, the returned value is assigned to the Population column.from work.unitedstates ; The UPDATE statement updates values in the SQL. The WHERE clause ensures that only the rows in SQL. NEWPOP are updated, by checking each value of Name against the list of state names that is returned from the in-line view.