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164 lines
6.5 KiB
Text
164 lines
6.5 KiB
Text
drop table if exists t1,t2;
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CREATE TABLE t1 (
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Period smallint(4) unsigned zerofill DEFAULT '0000' NOT NULL,
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Varor_period smallint(4) unsigned DEFAULT '0' NOT NULL
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) ENGINE=blackhole;
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INSERT INTO t1 VALUES (9410,9412);
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select period from t1;
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period
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select * from t1;
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Period Varor_period
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select t1.* from t1;
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Period Varor_period
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CREATE TABLE t2 (
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auto int NOT NULL auto_increment,
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fld1 int(6) unsigned zerofill DEFAULT '000000' NOT NULL,
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companynr tinyint(2) unsigned zerofill DEFAULT '00' NOT NULL,
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fld3 char(30) DEFAULT '' NOT NULL,
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fld4 char(35) DEFAULT '' NOT NULL,
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fld5 char(35) DEFAULT '' NOT NULL,
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fld6 char(4) DEFAULT '' NOT NULL,
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primary key (auto)
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) ENGINE=blackhole;
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INSERT INTO t2 VALUES (1192,068305,00,'Colombo','hardware','colicky','');
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INSERT INTO t2 VALUES (1193,000000,00,'nondecreasing','implant','thrillingly','');
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select t2.fld3 from t2 where companynr = 58 and fld3 like "%imaginable%";
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fld3
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select fld3 from t2 where fld3 like "%cultivation" ;
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fld3
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select t2.fld3,companynr from t2 where companynr = 57+1 order by fld3;
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fld3 companynr
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select fld3,companynr from t2 where companynr = 58 order by fld3;
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fld3 companynr
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select fld3 from t2 order by fld3 desc limit 10;
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fld3
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select fld3 from t2 order by fld3 desc limit 5;
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fld3
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select fld3 from t2 order by fld3 desc limit 5,5;
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fld3
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select t2.fld3 from t2 where fld3 = 'honeysuckle';
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fld3
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select t2.fld3 from t2 where fld3 LIKE 'honeysuckl_';
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fld3
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select t2.fld3 from t2 where fld3 LIKE 'hon_ysuckl_';
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fld3
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select t2.fld3 from t2 where fld3 LIKE 'honeysuckle%';
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fld3
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select t2.fld3 from t2 where fld3 LIKE 'h%le';
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fld3
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select t2.fld3 from t2 where fld3 LIKE 'honeysuckle_';
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fld3
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select t2.fld3 from t2 where fld3 LIKE 'don_t_find_me_please%';
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fld3
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select t2.fld3 from t2 where fld3 >= 'honeysuckle' and fld3 <= 'honoring' order by fld3;
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fld3
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select fld1,fld3 from t2 where fld3="Colombo" or fld3 = "nondecreasing" order by fld3;
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fld1 fld3
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DROP TABLE t1;
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CREATE TABLE t1 (a VARCHAR(200), b TEXT, FULLTEXT (a,b));
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INSERT INTO t1 VALUES('MySQL has now support', 'for full-text search'),
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('Full-text indexes', 'are called collections'),
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('Only MyISAM tables','support collections'),
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('Function MATCH ... AGAINST()','is used to do a search'),
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('Full-text search in MySQL', 'implements vector space model');
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SHOW INDEX FROM t1;
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Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
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t1 1 a 1 a NULL NULL NULL NULL YES FULLTEXT
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t1 1 a 2 b NULL NULL NULL NULL YES FULLTEXT
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select * from t1 where MATCH(a,b) AGAINST ("collections");
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a b
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Only MyISAM tables support collections
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Full-text indexes are called collections
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explain extended select * from t1 where MATCH(a,b) AGAINST ("collections");
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 fulltext a a 0 1 Using where
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Warnings:
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Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (match `test`.`t1`.`a`,`test`.`t1`.`b` against (_latin1'collections'))
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select * from t1 where MATCH(a,b) AGAINST ("indexes");
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a b
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Full-text indexes are called collections
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select * from t1 where MATCH(a,b) AGAINST ("indexes collections");
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a b
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Full-text indexes are called collections
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Only MyISAM tables support collections
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select * from t1 where MATCH(a,b) AGAINST ("only");
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a b
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reset master;
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drop table t1,t2;
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create table t1 (a int) engine=blackhole;
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delete from t1 where a=10;
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update t1 set a=11 where a=15;
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insert into t1 values(1);
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insert ignore into t1 values(1);
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replace into t1 values(100);
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create table t2 (a varchar(200)) engine=blackhole;
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load data infile '../std_data_ln/words.dat' into table t2;
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alter table t1 add b int;
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alter table t1 drop b;
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create table t3 like t1;
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insert into t1 select * from t3;
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replace into t1 select * from t3;
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select * from t1;
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a
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select * from t2;
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a
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select * from t3;
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a
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show binlog events;
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000001 # Format_desc 1 # Server ver: VERSION, Binlog ver: 4
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master-bin.000001 # Query 1 # use `test`; drop table t1,t2
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master-bin.000001 # Query 1 # use `test`; create table t1 (a int) engine=blackhole
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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master-bin.000001 # Query 1 # use `test`; create table t2 (a varchar(200)) engine=blackhole
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master-bin.000001 # Table_map 1 # table_id: # (test.t2)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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master-bin.000001 # Query 1 # use `test`; alter table t1 add b int
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master-bin.000001 # Query 1 # use `test`; alter table t1 drop b
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master-bin.000001 # Query 1 # use `test`; create table t3 like t1
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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drop table t1,t2,t3;
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reset master;
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create table t1 (a int) engine=blackhole;
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set autocommit=0;
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start transaction;
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insert into t1 values(1);
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commit;
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start transaction;
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insert into t1 values(2);
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rollback;
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set autocommit=1;
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show binlog events;
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000001 # Format_desc 1 # Server ver: VERSION, Binlog ver: 4
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master-bin.000001 # Query 1 # use `test`; create table t1 (a int) engine=blackhole
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master-bin.000001 # Query 1 # use `test`; BEGIN
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master-bin.000001 # Table_map 1 # table_id: # (test.t1)
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master-bin.000001 # Write_rows 1 # table_id: # flags: STMT_END_F
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master-bin.000001 # Query 1 # use `test`; COMMIT
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drop table if exists t1;
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create table t1 (c char(20)) engine=MyISAM;
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insert into t1 values ("Monty"),("WAX"),("Walrus");
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alter table t1 engine=blackhole;
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ERROR HY000: Table storage engine for 't1' doesn't have this option
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drop table t1;
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