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SELECT a FROM x;
SELECT "a" FROM "x";
SELECT "a" FROM "x";
SELECT "a" FROM "x";
SELECT x.a AS a FROM db.x;
SELECT "x"."a" AS "a" FROM "db"."x";
SELECT @x;
SELECT @x;
# dialect: snowflake
SELECT * FROM DUAL;
SELECT * FROM DUAL;
# dialect: snowflake
SELECT * FROM "DUAL";
SELECT * FROM "DUAL";
# dialect: snowflake
SELECT * FROM "dual";
SELECT * FROM "dual";
# dialect: snowflake
SELECT dual FROM t;
SELECT "dual" FROM "t";
# dialect: snowflake
SELECT * FROM t AS dual;
SELECT * FROM "t" AS "dual";
# dialect: bigquery
SELECT `p.d.udf`(data).* FROM `p.d.t`;
SELECT `p.d.udf`(`data`).* FROM `p.d.t`;
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